Velocity port access hole

DIY Modifications to the Benjamin Marauder, like Depingers, bolt handles, etc.
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Velocity port access hole

Postby Supercharged86 on Mon Apr 19, 2010 6:36 am

Hey Guys, I was getting quickly tired of removing the stock to adjust the velocity port, what a total pain in the ass. So I decided to make a small access hole through the stock to fit the 5/32" allen key. Cosmetically it may take alittle away from the smooth appearance but after a while you don't even notice it, especially if the hole is colored with some stain. But definately makes tuning a breeze, no longer a chore with on again off again. I took some very precise measurements so that I assured myself that the hole would be exactly where I needed it. This is definatley something they should have considered in the manufacturing process. Here's some pics but anyone needing more info please feel free. I apologize for those who have seen this elsewhere a while back. Thanks. Cheers. Steve




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Re: Velocity port access hole

Postby dogwood on Sun Apr 25, 2010 10:11 pm

nice work Steve, I will be doing the same to mine.
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Re: Velocity port access hole

Postby Supercharged86 on Mon Apr 26, 2010 4:32 am

Dogwood, The wood is soft and not very thick, you can basically turn the drill bit by hand, giving you total control. Good luck, you're gonna love it. Cheers. Steve
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Re: Velocity port access hole

Postby dogwood on Sat May 01, 2010 6:04 pm

since I got my chrony going, figured it was time to do this :)

and you're right the wood is soft and I was able to do it by hand, good thing as I have no idea where my drill is LOL

going to start tuning tomorrow :D
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Re: Velocity port access hole

Postby Supercharged86 on Sat May 01, 2010 6:08 pm

Awesome, glad it worked out for you. Keep us posted. Steve
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Re: Velocity port access hole

Postby dwalk on Fri Jun 18, 2010 8:09 am

i did it to mine as well...works great! :D
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Re: Velocity port access hole

Postby Supercharged86 on Fri Jun 18, 2010 12:32 pm

dwalk wrote:i did it to mine as well...works great! :D



Glad to hear it D. :D
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Re: Velocity port access hole

Postby ran007 on Thu Jan 20, 2011 3:22 pm

Steve, this is awesome! Are there any other adjustment you think can be made accessible by doing this?
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.22 Marauder, 80cf SCUBA Tank, Benjamin yoke adapter, Leapers 5th Gen 6-24x50. Pellet: H&N Baracuda Match 21.14gr, 5.51mm - 1/2" group @ 50 yards, 2400-1500psi.
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Re: Velocity port access hole

Postby Supercharged86 on Thu Jan 20, 2011 3:37 pm

Randall, the other two adjustments that you'll play with are the hammer stroke length and hammer pre-load, both from the rear end cap. I choose to leave the brass jam-screw out all the time, this way making adjustments through the new access hole are easier. If after finding the right combination of settings you want to throw the jam-screw back in, that's fine. But I've never had the VP screw change on it's own even after hundreds of shots. Just take your time and measure precisely, keeping the hole to a minimum and it will all look fine when your done. Cheers. Steve

ps. If you need further assistance with this, just send me a PM :D
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Re: Velocity port access hole

Postby ran007 on Thu Jan 20, 2011 7:24 pm

Wow - Thanks Steve! I appreciate your time in explaining all of this to me. I'm very good at woodworking, and making a metering screw hole through the wood shouldn't be much of a problem, unless the the wood has an internal knot in it. Otherwise, I'm really looking forward to making this thing work for me! How awesome.
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.22 Marauder, 80cf SCUBA Tank, Benjamin yoke adapter, Leapers 5th Gen 6-24x50. Pellet: H&N Baracuda Match 21.14gr, 5.51mm - 1/2" group @ 50 yards, 2400-1500psi.
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