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All Springer/NP/PCP Air Gun Discussion General > Engineering- Research & Development

Hammer Bounce

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sixshootertexan:
Ok this is 2 different guns. The .308 is a conventional bolt gun. You've seen it before. The .257 is a new gun. Conventional lower with boltless upper.
I'm using the same component design.

The .308
https://i.postimg.cc/t4tPThnB/DSC00325-zpsvxtfpyny.jpg

The .257
https://i.postimg.cc/pL9bHdRy/257-4.jpg
https://i.postimg.cc/CxtbknHw/20221014-185121.jpg

sixshootertexan:

rsterne:
OK, so the valves, both springs, and hammer weight and travel are all identical?.... What about the porting from valve to breech?.... It looks like the .308 bolt does not retract, so there must be a probe in the chamber?.... Do both valves have springs, and are they the same?....

Bob

sixshootertexan:
Yes all identical.  Porting is .25" in both. The .308 has a retractable bolt.

JPSAXNC:
Less hammer travel might help reduce the bounce.

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