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Got it done! Ended up with 8 .047 thk Bellevilles like this |))((|))((| .005 shims on ends and one .03 middle gave me 2900psi at rifle. With 4200 in bottle.

Thanks for reply. Yes that’s the same spec’s as mine. 600lbs Originally it had 11 Bellevilles.032thk and 3x .005 flat shims arranged like this tank< | )))((()))(( || giving me 2800psi. But after boring out bonnet and new piston only getting about 2k. Held depths to same dimensions. Don’t know...

Hi, my air Venturi 90ci bottle was leaking at regulator ck ball. Couldn’t find parts so I machined it to take new pin valve, piston and seat. That seals fine now. but need to set regulator output pressure at 2900psi. Bottle rated for 4500 and regulator stamped 2900. My problem is what is the...

Thanks Matt, I set the metering screw at 4-1/2 turns. Don’t have a chronograph. I was thinking .starting at 02 - .04 and backoff till pellet drops a little but unsure. This is my first airgun.

Hello all, I picked up a benjamin marauder gen 2 that had an air leak. I put a seal kit in it and fixed that. Also an Hdd kit from air guns of AZ. Set spring length at 2” per instructions. So my big newbi question is what would be the starting setting? Instructions don’t say anything about an...