.25 CO2 beast

Gotcha. The valve is off set from the center.
Which i assume is part of the reason it has a central guide. To stop the hammer tilting as it hits. Cheers

How does actuate the valve?
Being that shaft is screwed into the valve and im assuming doesn't move, and hammer is hollow in the middle to slide down the shaft, im at a bit of loss as to where the hammer contacts on the valve set up to cause the pushing motion to open the valve.
Im looking at it from limited understanding and basing it off a 1322 valve which strikes a central pin pushing the valve open.
What am missing/ not seeing in your design?
Love the pics with lathe in motion. Brings back memories from yesteryear.
Very envious of you guys who set up a permanent base and set up with the tools to make use metal.👍

J-S wrote: BC_Clark wrote: I love seeing custom builds. Following this build with interest. CO2 is well capable of 30 ft-lbs in .25 and it may use less gas than expected. e.g. I got 26 ft-lbs in .35 from a 6" barrel and it used 1.1 grams per shot. You should share some of your builds here!

Keen to see how this turns out, ive done a few .25 CO2 builds over the years but only with standard sized valves that I have hogged out for more volume, will be interesting to see what sort of power you can get out of a full custom valve!

From memory one of the Crosman builds I called the 2540 got about 16 fpe from a 10" barrel, and the 25cal CR600 i built for Zooboy got about 22fpe from a 20" barrel. Both of those just ran on 12gr cartridges.

BC_Clark wrote: I love seeing custom builds. Following this build with interest. CO2 is well capable of 30 ft-lbs in .25 and it may use less gas than expected. e.g. I got 26 ft-lbs in .35 from a 6" barrel and it used 1.1 grams per shot.

A true custom trigger. Good stuff!