New forum installed: Welcome everybody!
I'll post some pics soon.
which was a 10cm vertical string at 25 metres...
Looks nice. Well done.What ammo are you using? sub-sonic or standard ammo? Sounds like the bolt isn't being blown back far enough (or with enough force).If you are using subsonic ammo, try std ammo (supersonic). Also could try freeing up the bolt a little. Are there any noticebale wear points on the bolt where it is rubbing in the receiver. A bit of oil might help.That's as far as my knowledge goes I am afraid.