• The Shot You’ll Never Forget Giveaway - Enter To Win A Barrel From Rifle Barrel Blanks!

    Tell us about the best or most memorable shot you’ve ever taken. Contest ends June 13th and remember: subscribe for a better chance of winning!

    Join contest Subscribe

Sources of pressure

308sako

Gunny Sergeant
Full Member
Minuteman
  • Feb 15, 2008
    1,279
    49
    125
    Brothel Nevada
    Recently working with 2 different .260 rifles. One an AI the other a JP. what I am finding difficult to understand is why the gas gun is apparently so much more sensitive to pressure. This is based on my "ignorant" assumption that regardless of the breech in the chambers and ammunition should be yielding similar pressures.

    So what am I missing here?