Thread: Vertical Stringing

Have been frustrated by a mates 280AI recently, while developing a new load for the 150gr LRAB’s, due to the unavailability of RL17. After thinking that we had it dialled-in, it will string shots vertically, each getting progressively higher, in the order of 4-6 inches higher. Typically, the first two shots have the same POI, but after that things go to shit. A first shot from a cold barrel will always be spot on.

I always thought that this sort of vertical stringing was due to bedding? But we can’t see anything wrong with it. Action screws are consistently tight etc. We did try some forend pressure, but that made no difference.

Rifle is a Brno 600ZKK, 24” Shilen, bedded etc with Vortex 4-16 HS scope.

Anything obvious we may have missed? Short of re-barrelling the bastard thing…..