Thread: 7mm-08 reloads extraction issue - thoughts please

Greetings @Jhon and all,
A couple of observations that may not have been covered. First the 129 grain Hornady projectile is noted as being soft and needs a little more powder to develop the same velocity. From your OP I gather these gave no problems. From my measurements the 139 grain SST is around 2mm longer so may develop a little more pressure due to the reduced case volume. Hodgdon lists 42.2 grains as max for the 140 grain A Frame and Nosler lists 42 grains for their generic 140 grain data. This leads me to believe that 42 grains may be a more sensible max for the SST projectiles. The likely lack of primary extraction has been well discussed and may be inherent with the rifle. This leaves the cases. Each time a case is sized the worked section of the brass becomes a little harder. The same thing happens when it is fired. This may explain the return of sporadic problems with case sticking.
Hope this helps. GPM.