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Old 20th July 2016, 11:36 AM
A.Williams A.Williams is offline
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Join Date: Oct 2015
Member of: midshires
Location: leighton buzzard
Posts: 8

Dont diy a reg, you will be forever fiddling to get it right.

Easier way to get consistency from and s400 is to degrease and polish hammer rail then either shim the hammer spring or fit a new hammer spring that is approx 25% stronger then bring the velocity back down using the venturi screw. Stronger spring/ more preload will bring the working range off the fireing valve higher up to around 160/170 bar. If you fit an fac air cylinder you can easly get over 100 shots withing a 12-15fps spread with pellets straight from the tin.
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