Survey please help Fills shots and refill at pressure.

DIY Modifications to the Benjamin Marauder, like Depingers, bolt handles, etc.
Mod parts offered for sale should be posted in the AFTERMARKET section.

Re: Survey please help Fills shots and refill at pressure.

Postby MtnBikerSniper » Thu Aug 02, 2012 5:19 pm

Maruader
.25 cal
3100 psi starting pressure
16 shots
2200 psi ending pressure
.25 cal Marauder
mods: Reservoir extension
10 lb hammer spring
Lawyer spring mod

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Re: Survey please help Fills shots and refill at pressure.

Postby louigi600 » Sun Aug 26, 2012 11:54 pm

Gun: Marauder with buffer installed
caliper: .177 (with 9.4 grain pellets)
Start Pressure: 2900
shots: 30
End Pressure: 2100

First 15 shots have an avarage velocity of 994 fps and a standard deviation of 2.2 fps.
The next 15 start dropping off about 6 fps each shot ending up at about 896 fps.
Regards
David

Benjamin Marauder .177 cal.
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Re: Survey please help Fills shots and refill at pressure.

Postby eelect » Mon Aug 27, 2012 5:23 pm

Fill pressure 2800
End pressure 2220
30 shots
hi 865 low 855 au 858 es 10 sd 2

Fill pressure 2800PSI
End pressure 2110
Hi 865 low 840 au 856 es 25 sd 5
40 shots
Great Heavy Duty Target Holder For Sale
Evanix RS II .22
Benjamin Mrod .177 for sale!
Hawke 6.5-20x42 Sidewinder Tactical scope
Hawke Varmint SF 4-16x42

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Re: Survey please help Fills shots and refill at pressure.

Postby louigi600 » Wed Sep 05, 2012 12:44 pm

After a quite some trial and error I was able to get this:
Start pressure: 2900 psi
52 20fpe shots on 10.6grain pellets cal .177 (extreme spread 32 fps)
End pressure 1900 psi

Buffer installed but no HDD.
Regards
David

Benjamin Marauder .177 cal.
louigi600
 
Posts: 379
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Re: Survey please help Fills shots and refill at pressure.

Postby Keith_J » Tue Nov 27, 2012 8:28 pm

Marauder .177.

Tuned for 3000 PSI fill, 950 ft/sec with Crosman Premier 10.5 grain pellets.

I get 30 shots with standard deviation of 12 ft/sec with ending pressure of 2050 psi.
.177 Marauder with Nikon 3-9 rimfire scope
.177 Diana 48 (RWS) with 4-12 RWS illuminated reticule scope
.177 Benjamin 347 antique.
.38 Crosman 1100 CO2 shotgun antique
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Re: Survey please help Fills shots and refill at pressure.

Postby paperpunch » Tue Jan 01, 2013 7:35 pm

I have the marauder .177 with the following tune I am getting 30 shots from a starting press. of 2200 and end press. of 1200
with jsb 8.4gr diablo domes.
Valve spring:CW2 from full ccw
Striker: CW8 from full ccw
Velocity: CC2 from full cw
Cannot say the fps 'cause it wasn't light enough for my chrony to work when I ran this test.
PaperPunch
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Re: Survey please help Fills shots and refill at pressure.

Postby Barnydaddy » Tue Jan 01, 2013 8:34 pm

BTW....
Sports Chalet in Vacaville will sell you a card: $45.00
This gets you 10 fills instead of $50.00
Marauder .22 & .177
Beeman R1 .177
Tempest .177
Blue Streak .20
Bug-a-Salt

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Re: Survey please help Fills shots and refill at pressure.

Postby cen-tex.25 » Sun Jan 13, 2013 3:52 am

.25 marauder

43.2grn eunjin

8 shots(1 clip)

fill 3200psi

end 2600psi

es 10

sd 3

1-778
2-780
3-784
4-788
5-787
6-783
7-780
8-778
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Re: Survey please help Fills shots and refill at pressure.

Postby ezman604 » Wed Jan 30, 2013 3:36 pm

1. Marauder
2. .25 Caliber
3. Fill Pressure 2800psi but sweet spot is between 2500 down to 2100psi
4. 24 shots before refill
5. Ending pressure 1950psi after 32 shots.

Shooting H&N Baracuda Hunter Extreme 28.40gr
At 2500psi top out at 820.95fps for 42.51fpe
Shot #24 is at 784fps for 38.77fpe
This with a 10# hammer spring turned in approximately 2 turns.

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Survey please help Fills shots and refill at pressure.

Postby ShawnHu » Thu Jan 31, 2013 12:21 am

ezman604 wrote:1. Marauder
2. .25 Caliber
3. Fill Pressure 2800psi but sweet spot is between 2500 down to 2100psi
4. 24 shots before refill
5. Ending pressure 1950psi after 32 shots.

Shooting H&N Baracuda Hunter Extreme 28.40gr
At 2500psi top out at 820.95fps for 42.51fpe
Shot #24 is at 784fps for 38.77fpe
This with a 10# hammer spring turned in approximately 2 turns.


Very nice.
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Joined: Mon Jul 23, 2012 9:07 pm

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