Marauder Reviews
moisture in air reservoir?
Fri Jan 14, 2011 9:41 pm // 2 comments // pb95
Hi, I am concerned about using a benjamin hand pump to fill my marauder. I am afraid it allows moisture into the reservoir, which may cause the inside to rust. Is it okay to use a handpump, or do i need to invest in a scuba tank?
trouble with psi affecting accuracy
Fri Dec 24, 2010 8:12 pm // 3 comments // pb95
i have a .22 cal marauder that i recently purchased. I am having some issues regarding the fill pressure affecting my accuracy. I cannot get my gun to group well over about 2100 psi. It would be fine for target shooting, but i intend to hunt with my marauder. I am shooting crosman premier 14.3gr pellets. I am concerned with the knock-down power of low pressures and need to tune it to about 2800psi or so to be satisfactory for my preferences. I have no previous experience with PCP's and i am not exactly sure how to tune my rifle to group well at higher pressures. It looks like i am patterning a shotgun at 40 yards when i get up to about 2400 psi. I have lots of experience with firearms and i am confident in my shooting skills, so i am sure it is an issue with the gun. The only thing i know to do is tweak the velocity a bit, but higher velocities supposedly shoot worse groupings. I greatly appreciate any recommendations or tips on tuning my mrod to higher fill pressures.
Thanks,
Peyton
BENJAMIN MARAUDER 5.5 - By Artilheiro translated
Tue Sep 21, 2010 11:27 am // 3 comments // Vakeiros
primeiro, Artilheiro se não tiveres de acordo com algo que escrevi ou com tudo diz que apago.
Ok, since a lot of people don't know Portuguese, i decided to translate the review of our friend Artilheiro.
So here we go:
Artilheiro wrote:About 4 months after my .22 Marauder arrived, and after many tests and tweaks. I think i managed to gather a good quantity of data and info to do this review.
Specs
Benjamin Marauder was developod by Crosman that provided a gun full of resources and tweak options until now avaiable only on High-End airguns. "She" has a Crosman rifled and cocked barrel (like BSA Super Ten) and on my specific gun, when i took the barrel band oring it became a full floating barrel that gave me a nice accuracy increase! So if it was already good, just made it better. Besides all this it is a Shrouded Barrel that makes this gun very quiet. The Mrod has a variable working pressure between 1700PSI (120BAR) to 3000PSI (206BAR). Because of this resource it can be feeded with either HPA or CO2. She can be charged via Handpump or a Scuba Bottle. This is a good feature to the ones who practice aoutdoor shooting.
Manufacture Specs
Noise: about 85dB.(low-medium).
Barrel Length: 20" (508mm)
overall legth: 43" (1092mm)
Magazine Capacity (clip): 10 pellets
Barrel: rifled and chocked
Open Sights: NA.
Scope Mount: dovetail 11mm.
Weight: 7.5 lbs (3,4kg)
Trigger: 2 stage adjustable
Trigger weight: about 1,5 lbs (680g)
Butt Pad: original, ventilated. Mine has an adjustable one.
Fuel: PCP(Pre-Charged Pneumatic) or CO2
Safety: Manual (lever in front of the trigger)
Visual: Rifle.
Taking Marauder apart.
Valve and Gauge Suport.
Valve.
Rear of the valve.
Valve Pin (where striker hits to open valve, don't really know you do you call it  ).
Valve inside.
Valve spring
Gauge suport.
Mounted Gauge suport and Gauge.
Gauge mounted on the tube.
internal view of the striker (hammer).
Mounting the striker on the tube.
Transferport.
Installed Transferport.
Installing Bolt on the tube.
Piece to align barrel on the shroud.
Disassembling charge connector.
TRIGGER
As we can see on the pictures, all trigger parts are metalic. It has very adjustable tweaks such as:
- Trigger weight(A),
- 1st Stage(B)
- 2nd stage(C).
- Trigger position (D).
If this te«weaks aren't enought, to set this trigger very light, i took off the spring as is showned on the pictures. When i took this spring off, the trigger weight reduced more then 40%!
MAGAZINE (Clip)
As everything on Marauder is simple so is the clip. There's no lever neither locks, it has a central string inside (see the picture) that makes the wheel (where the ammo is) rotate, so, when we pull the bolt it automaticly rotate and bring a pellet to the inlead position, when we push the bolt we also push the pellet to the inlead of the barrel and it's done, pellet on the barrel ready to shoot. To fill the mag with pellets, just need to rotate clockwise the transparent plastic display numbered from 1 to 10 until it locks. Then we insert the first pellet and we start rotating the same piece this time anti-clockwise and we put a pellet on each slot until we get to the place we start. When it clicks we're done to put it on the chamber by the right side of the gun. One detail: after the 10th shot when we pull the bolt we will not be able to push it back this means we're out of shots so we take the mag of and either put another mag or refill this one and insert it back, after inserted we just need to push the bolt and we are ready to shoot again.
Shroud
One more hot feature of the Marauder. The 4 chamber system works so good that sometimes we only ear the metallic sound of the striker hitting the valve! The test made by Paul Capello had a result just a little over 85dB, the same test done on an AA S410 Extra FAc in low power mode resulted on 101.2dB.
Stock
Made of Beech, it's a very well finished piece, light and ambidextrous. On mine, I removed the original butt pad and putted an adjustable one, this resulted on a much comfortable and firm stock when aiming. The action is attached to the stock by a single screw this definitely makes things very easy when unmounting for maintenance, cleaning or tweaking.
Setting the fill pressure
The Mrod was projected to work on a pressure band from 1700 to 3000PSI. This is done by adjusting the tension of the hammer spring and the travel length of the hammer through a central screw. We can access both the screw and the spring introducing an Allen screw driver of 1/4 (spring) or 1/8 (srew) on the srew hole in the end of the tube (right bellow the bolt). On my gun I took advantage of the screw in the hole and screwed a screw here now it looks better (Artilheiro only did dis because of the looking, but this hole should be always closed to prevent dust and stuff from entering the hammer chamber). One of the secrets on the marauder is find the right equilibrium point between these tweaks! From these two tweaks will vary both the air wasted per shot and the pellet velocity.
Velocity Fine Tuning
This fine tune is made from a precise procedure so we can have the velocity we want inside the gun limits of course. To do this tune we have to take the stock off. The tune is done on a screw that is located on the valve body. As we screw in (clockwise) lower the velocity (by screwing in we're closing the air passage on the transferport), if we screw out (anti-clockwise) higher velocity (by doing this more air pass through the transferport). This tune is very sensitive, 1/4 of a turn do a big difference on the velocity. To access the screw you need a 3/16 Allen screw driver and remove the lock screw first (photo 1). After remove that screw, with the same Allen key we can do the tune itself (photo 2). After you are satisfied with the tune don't forget put the locking screw back. After this tune you'll notice that the velocity will be almost constant.
_photo1_____________________________photo 2
It's possible to drill an hole on the stock so we don't need to remove the stock to do this tune (thanks to Supercharger i think) but you may not like the look of that.
Another way to lower the velocity is replacing the transferport by another with a smaller hole, this is one of the next tunes i intend to do. It's my intention to get 885-900 fps (270-275m/s) with 15gr pellets from a 1600PSI pressure.
Groups
All this tests were made with a 2600PSI (180bar) initial fill pressure. These groups were made at 20, 25, 31 and 36yd (18, 23, 28 e 33m). The same distances of 1/5 metallic target matches here in Rio. AS in the matches there are 5 target per distance i made 5 shots per different pellet type at each distance (don't know if i'm being very clear here because my english kind of sucks... anyway move on). To each distance i reset the pressure to 2600PSI, this way we can see the different performance of each pellet on my Marauder and which one is the best on my gun. After i tested very types of pellets theses were the best results:
Crosman Premier “Domed”
Crosman Premier “Hollow Point
Barracuda Match Extra Heavy
JSB Match Exact RS
So with all this data we can conclude that for my Mrod, at 20yd the best is Barracuda, 25yd CP Domed, 31 and 36yd the CP HP
Velocity
With the previous pellets were made velocity tests and these are the results:
Well, in first place these are the results taht i wanted to share with you guys. As i said previously, the MRod is a gun that offers a big diversity of tweaks and tunes, so as i'm changing my tunes i'll share the new results. Last week i received the 24" LW Barrel, because of his length i'll have to resize the shroud (crosman barrel only has 20"). I'm already working on a new transfer port too.
Artilheiro wrote:Recently i made in Imbúia(wood type) a fore-end (i know them as hamsters). This accessory improved the aiming. 
Artilheiro wrote:Looking to improve on what I think was good, I took courage and made an adjustable Cheek Piece for the Marauder.
Cutting and installing the hardware.
The assembly.
The final finish.
hope you enjoyed this, this give me some work
regards
good shooting for all
BENJAMIN MARAUDER 5.5 REGULATED - By Artilheiro
Sat Aug 14, 2010 3:02 pm // 22 comments // Artilheiro
Depois de quase quatro meses do recebimento da Marauder 5.5, e após a realização de muitos testes e ajustes. Acho que consegui reunir uma quantidade de dados e informações para este Review.
CARACTERÍSTICAS.
A Benjamin Marauder foi desenvolvida pela Crosman que a equipou com recursos de regulagens, disponíveis apenas em armas de padrão Top. Ela é dotada de um cano Crosman, raiado com choked (ídem BSA Super Tem) e no caso específico da minha, ao retirar o o’ring interno do suporte, ele ficou “flutuante”, o que proporcionou ganho considerável na sua precisão. Ou seja, o que já era bom, ficou melhor ainda. Além disso, ele é Bull Barell, o que garante um disparo bem silencioso. A Marauder trabalha com pressões que variam de 1700PSI(120BAR) a 3000PSI(206BAR). Em razão deste recurso, ela tanto utiliza o PCP como o CO2. Ela pode ser carregada com o uso de uma bomba de mão como por um cilindro de alta pressão. Este recurso, facilita muito a sua maneabilidade, principalmente para aqueles que a utilizam na prática do tiro ao ar livre.
DADOS do FABRICANTE.
Som: cerca de 85dB.(considerado, baixo-médio).
Comprimento do cano: 508mm.
Comprimento total: 1092mm.
Capacidade do magazine(carregador): 10 tiros.
Cano: raiado com choked(“afunilamento” antes da coroa).
Sistema de mira aberta: indisponível.
Sistema de mira ótica: trilho (dovetail) de 11mm.
Peso: 3,4kg. (sem luneta)
Gatilho: ajustável de 2 estágios.
Peso do gatilho: aprox. 680gr.
Soleira: original, ventilada. A minha está com uma ajustável.
Propulsão: PCP(Pre-Charged Pneumatic) ou CO2
Segurança: Manual (alavanca à frente do gatilho)
Configuração: Rifle.
Desmontando a Marauder.
Conjunto válvula/suporte do manômetro.
Válvula.
Parte traseira da válvula.
“pilotinho” da válvula.
Interior da válvula.
Mola do “pilotinho”
Base do Manômetro.
Suporte do manômetro(int. cilindro) e manômetro.
Manômetro- conjunto montado no tubo de pressão.
Vista interna do martelo.
Colocação do martelo no tubo de pressão.
Transferport.
Transferport instaldo no tubo de pressão.
Instalação da culatra (Breech) no tubo de pressão.
Ponteira de alinhamento do cano no Bull Barell.
Desmontagem do conector de carregamento.
GATILHO.
O mecanismo como pode-se ver nas fotos, é totalmente metálico. Possui vários ajustes tais como:
Regulagem do peso do conjunto do gatilho(A),
Regulagem do 1º estágio(B)
Regulagem do 2º estágio(C).
Posição do gatilho(mais avançado ou mais recuado) (D).
Como se não bastassem todos estes ajustes, para deixar o gatilho no padrão “cabelinho”, eu retirei a mola conforme mostram as fotos abaixo. A retirada desta mola do gatilho, reduziu o seu peso em mais de 40%.
MAGAZINE
Como tudo na Marauder prima pela simplicidade, o mecanismo do magazine não foge a regra. Nada de alavancas nem travinhas. Uma mola central,em seu interior(vide foto) é responsável pelo movimento de municiamento. Ou seja, puxou o ferrolho para traz ele automaticamente já posiciona o chumbo na culatra do cano. Empurra-se o ferrolho à frente e pronto. Está carregado. Para municiá-lo, basta deslizar o display de acrílico, que é numerado de 1 a 10 no sentido horário, até que ele trave. Coloca-se o primeiro chumbo e inicia-se o movimento deslizante no sentido anti-horário colocando um chumbo em cada posição. Ao chegar no ponto inicial, é só travar(ouve-se um click) e está pronto para ser inserido na culatra pelo lado direito. Aliás, para quem é destro, é uma mão na roda. Um detalhe, ao se puxar o ferrolho após o 10 tiro, o magazine faz com que o ferrolho fique travado indicando a necessidade de sua troca por outro. Este outro ao ser colocado, basta empurrar o ferrolho à frente que a arma está carregada.
BULL BARELL.
Este é mais um dos pontos altos da Marauder. O sistema composto por quatro câmaras, funciona tão bem que as vezes só se ouve o som metálico do martelo batendo no piloto da válvula de disparo. Teste efetuado pelo Paul Capello obteve um valor pouco maior que 85dB. O mesmo teste efetuado na S410 XTRAC-FAC alcançou 101,2dB.
CORONHA.
Feita de Faia(um tipo de madeira de Lei), é uma peça muito bem acabada. Leve, possui enpunhadura ambidestra, o que facilia a vida de destros e canhotos. Na minha, retirei a soleira ventilada e coloquei uma ajustável. Resultado, a empunhadura da arma tornou-se muito mais firme e confortável. A fixação da parte mecênica nela, é feita por um único parafuso o que facilita a desmontagem para manutenção.
AJUSTANDO A PRESSÃO DE CARREGAMENTO.
A Marauder foi projetada para trabalhar numa faixa de carregamento que vai de 1700 a 3000PSI. Isto é feito, ajustando-se a pressão da mola do martelo(hammer spring) e o curso do martelo, através de um parafuso central. O acesso tanto à mola quanto ao parafuso, é feito, introduzindo-se uma chave Allen de ¼ (para a mola) e 1/8 (para o parafuso) por um orifício rosqueado no final do tubo de pressão. Na minha arma, por motivos estéticos, aproveitei a rosca e coloquei um parafuso neste orifício. Um dos segredos da Marauder é encontrar o ponto de equilíbrio destes ajustes. Dele, vão depender o consumo de ar por tiro e a velocidade.
AJUSTE "FINO" DA VELOCIDADE.
Este ajuste, é feito de uma forma precisa para que você possa obter a velocidade que você deseja, dentro dos limites de capacidade da arma. Para isto, é necessário retirar a parte mecânica da arma da coronha. Ele é feito por um parafuso de ação, localizado no corpo da válvula. Quanto mais fechado(sentido horário) menos ar passa pelo Transferport. Conseqüentemente, menos ar passa para o cano, e a velocidade diminui. Girando-o no sentido anti-horário, o fluxo de ar aumenta e a velocidade também. Este ajuste, como todos os demais na Marauder, é muito sensível. Basta dizer, que ¼ de volta faz uma diferença considerável no valor da velocidade. Para ter acesso a este parafuso, é necessário inserir uma chave Allen 3/16, retirar um outro parafuso que funciona de trava(foto 1). Feito isto, e com a mesma chave, dá-se início ao ajuste propriamente dito(foto 2). A partir deste ponto, é que você perceberá que a velocidade ficará quase que constante.
_foto1______________________________foto 2
É possível fazer um furo na coronha de modo que esta regulagem, possa ser feita sem a necessidade de se retirá-la. É uma um recurso, contudo, de gosto duvidoso.
Outra forma de se alterar a Vo, não só da Mrod como de qualquer outra PCP, é trocando o Transferport por outro de diâmetro interno menor. Este alías, será um dos próximos ajustes que pretendo fazer. Minha intenção é deixá-la com uma velocidade em torno de 270 a 275m/s com munição de pouco mais de 15gr e numa pressão de saída do transferport de 1600PSI(110BAR).
AGRUPAMENTOS
Todos os testes foram feitos, carregando-se a Mrod com 2600PSI(180BAR) de pressão inicial. Foram feitos agrupamentos à distâncias de 18, 23, 28 e 33m. Ou sejam, as mesmas distâncias para provas de silhueta metálica 1/5, disputadas aqui no Rio. Como na prova existem 5(cinco) silhuetas por distância, foram feitos 5 tiros por tipo de chumbo em cada uma das distâncias. (5x18, 5x23, 5x28, 5x33). Para cada distância, foi registrada a pressão inicial. Este método, proporcionou uma visão do desempenho de cada tipo de chumbo, em relação às distâncias. Ou seja, para uma determinada distância, foi possível detectar o chumbo que melhor agrupa. Depois de testar diversos tipos e marcas de chumbo, os que apresentaram os melhores resultados foram:
Crosman Premier “Domed”
Crosman Premier “Hollow Point
Barracuda Match Extra Heavy
JSB Match Exact RS
Portanto, com os dados acima, podemos concluir que na minha Mrod, para 18m o melhor chumbo foi o Brracuda, para 23m o CP“Domed”, para 28m e 33m o CP Hollow Point.
VELOCIDADE
Com os chumbos acima, foram feitos testes de velocidade (Vo), que apresentaram os seguintes valores:
Bem, num primeiro momento, estes são os resultados que eu queria passar para vocês. A Marauder como dito anteriormente, é uma arma que oferece uma gama muito grande de ajustes. Por isso, à medida que eu for fazendo novos ajustes, atualizarei este review. Semana passada, recebi o cano LW de 24’ que vou colocar nela (uma obra de arte). É claro que isto vai implicar num aumento do comprimento do Bull Barrel já que seu cano original tem pouco mais de 20’, e conseqüentemente, o deslocamento de seu centro de gravidade mais para a frente da arma. Já estou trabalhando também num novo Transferpor. Minha intenção, é aumentar a Vo e diminuir o consumo de ar. Minha meta é atingir uma Vo em torno de 280m/s a 1600PSI(110BAR) com munição de 15,9gr.
2nd impression - 22 Marauder
Thu Jun 10, 2010 8:45 pm // 0 comments // bboydtx
I have had my gun a little over a week and I am having a blast now that I have the suba set up. Pumping this thing with the Ben hand pump sucks. I am still using the factory settings. I am on my first fill from the scuba tank. Filled to 2500# and after 20 shots It is at 2000# using 14.3 gr. Ben HP which is what PA used when checking the gun (10 for $10 test) The tape they sent me was 925 fps for first shot and 881 fps for the 10th. From what I have read in reviews that sounds a little high but I am happy and will not change the settings for now. I am getting 3/8" groups at 56' indoors. I have shot birds at 50+ yards with no hold over. I have a bunch of expensive German rifles that will be gathering dust. Tip--I have a shooting stick. the V unscrews and will screw on a camera tripod. It makes a great shooting rest. I have a long and a short bipod and this set-up works as good as the long one for shooting from the sitting position and I don't have to remove the bipod to put it in my safe. When recooped financially I will get a Chrno. and maybe a limanated thumbhole stock. I am loving the accuracy,power,multi shot without cocking a break barrel and especially the quiteness for backyard shooting. I can't wait to take it small game hunting. If I restock it I will try to post pictures.
First impression of 22 Marauder
Wed Jun 02, 2010 10:52 pm // 2 comments // bboydtx
Got my 22 Marauder today after weeks of research. I got the 10 for $10.00 deal,3 Mags and the Benjamin hand pump. Don't know if it was the 10 for 10 inspection or I just got lucky but the fit,finish and function are perfect. Mounted a 4X16x40 Center Point scope ( I have 3 of these and they are great for the price ) The gun came with 2200# of air. It was tested at 2500#. 890/925 fps with 14.5 gr. Discover hollow points. I did not add any air to sight in at 20 yards. Took me 5 rounds to hit a 3/4" dot with the next 5 rounds. I was impressed. I then picked off 6 doves offhand from 35 to 50 yards. 5 of them fell straight down. I missed the first 2 because i was holding a little high. Very flat from 20 to 50 yards with only 2000#. Now the negative part. I am 68 yo and pumping this thing to 2500# is a chore. Because of the reviews I read I bought a 80CF 3000 psi al. scuba at a locaL Dive shop. I ordered a Kingman yoke with Foster conecter 5 days ago from Az. Air Guns. It has not shipped and they will not respond. I paid $99.00 plus shipping. Probably My last purchase from them. I will stick with Pymamid in the future. I have 5 German guns that cost way more and the quality is superior. This is my first PCP and will probably not shoot the springers much any more. I bought a Benjamin Super Streak about 6 months ago. It is a grear hard hitting Springer that someone can get a great deal on. I love the 22 Marauder !!
.25 Cal. Marauder
Wed Apr 14, 2010 7:16 am // 1 comment // alhefner
I got my .25 Cal late Monday via UPS from Pyramyd Air. I got a package deal with a good Leapers 4 - 16X scope and case. I also bought 4 different heavy pellets to go with it. I already had a Benjamin hand pump for my Discovery.
Yesterday, I took the Mrod out to the desert to lean a bit about it and get the scope sighted in. I set the target up at only 10 yards just to see if the scope would get me on the paper. It did and of course, I forgot to bring any hex wrenches and the scope dials were locked down! Oops!  Oh well, I decided that since it did at least hit the paper at 10 yards, I might as well run a few pellets through it...now I discover I forgot to bring along the Eun Jin pellets I really wanted to have for hunting! 
OK,, so I at least had the rifle, 3 other brands and types of pellets, and the pump! 
Here are the pellets and groups from each. These are 8 shot groups...handy since the Mag is an 8 shot Mag...
Beeman Kodiak Extra Heavy:
Group:
H&N Spitzkugel, 24.85 grain:
Group:
H&N Baracuda, 31.02 grain:
Group:
I liked the H&N Baracuda best but still wanted to try out the Eun Jin pellets and sight in the scope so I packed up and headed back to the house.
OK, Now I get back to my shooting spot after my trip home and have all that I need to continue my tasks! 
I set up a bench on a portable table. Put the target out to 20 yards and start off with pumping the Mrod to just over 2800 psi on it's built in meter. Shot a group and found that the first two shots were a bit wild then things settled down. Got the scope pretty well sighted quickly but I still didn't have the hang of how much air I should be using! 
First of all, pumping up the Mrod with the Benji pump is a bit of a workout! I put about 120 or so pellets through it yesterday and found out all about that! I found that for every 100 psi of air pressure you want to put into the rifle, you'll pump about ten strokes on the hand pump. The air reservoir on the Mrod is larger than on the Discovery and that equates to more volume and more pumping even if you don't figure in the pressure difference.
Shooting was fun and I found that I can get about 20 or so good accurate shots per fill. The fill pressure I found working best was 2700 psi and only letting the pressure drop to about 1800 psi with the heavy pellets I want to put through it. I guess I will grab another two mags for it and just count on either a refill at shot 20.
Speaking of pellets, overall the H&N Baracuda pellets worked best for me. The heavier Eun Jin pellets turned out to be a bit on the wild side. In My Disco, H&N pellets don't work well at all and the heaviest Eun Jin pellets are the best...ya just never know till ya try! Oh well! I only bought one time of Eun Jin for the Mrod anyway.
The only adjustment I have made to the Mrod so far was the "velocity" adjustment. I don't have a Chronograph so I simply turned it all the way in and backed it out again 4 1/2 half turns to ensure the tube was 100% open for max air flow. Certainly NOT scientific but it seems to work for me.
That's my "first look" so far...I'll be posting in other sections of the forum with other things as time goes on.
Al
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