The UK's Finest Independent Forum for Shooters and Gun Owners. Est 2010.

Sim G wrote:Have a look at your recoil spring. A worn spring may not be driving the bolt hard enough to fully seat the cartridge so the firing pin is hitting a rim that moves and hence takes all the energy out of the strike.

I'm going to swap out the charging handle with one of the enlarged ones (once I find a supplier!) and I think they come with the spring assembly? So hopefully I can use that to eliminate the chance of a week spring.

Quick update.. Seems to have just been a bad batch of ammo, a new pack has just worked perfectly for every round.

Very strange though.. I think I'll swap to a different brand for subsonics anyway. I like to be sure it'll go bang when I pull the trigger!

Cool.