Originally Posted by MaD
There's 2 ways to do a centerfire PGP bolt. One is like you said. You'd have to lengthen the pump stroke / rod and move the bolt pin to accomidate. The other more creative way (which I think they're referring to) was to "mill out" a short channel in the bottom of the bolt and use a small slide in it. The bolt pin went into the slide and this allowed the extra travel in the bolt.
That explanation is probably clear as mud so if I can find the one I have I'll take a pic.
Yea, the General Joe's Centerfire PGP bolt used the 2nd explanation...PPS uses the first method.
Originally Posted by Pif
Is there really an advantage to a centerfire bolt? I love the system it had.
Yea, the one I saw used resulted in a 40fps jump in the PGP it was installed it...your results may vary of course but for that particular PGP it was PERFECT.