Hey guys, I know there has been a number of 7.62x25 builds now, some blowback and some gas operated. I was wondering if anyone has chronographed the rounds from their builds. I never chonographed my blowback build, but if I purchase a chrony to replace the one I sold I'll do it. I'm just wondering if guys are getting more velocity from the gas operated guns. Since many guys added some weight to their bolts on blowback guns I wonder if there is any difference at all. Just wondering, I have another 7.62x25 barrel I cut to romy specs from a 1919 .308 barrel and if the velocity difference is great enough, I'll build a gas operated gun. I love my blowback gun though, took me a while to get the drums and mags running perfect, sure is fun dumping 70 rnds without a hitch.