Thread: bolt failure P14

I use AR2213SC in a 26" barrel with the my .30/06 and the powder difference between hot but no pressure signs on the case to primers falling out is bugger all. I am running 167 grain Lapua Scenars at 2950 fps, good extraction and no pressure signs. 3030 fps gives popped primers and stiff extraction. The powder difference is 0.5 grains. The action is a Winchester M17 with a Vulcan match barrel, and accuracy is about 0.5 MOA. Clearly AR2213SC pressure spikes badly when the maximum load is exceeded by even a small amount. When the load is right, and the barrel is long enough to burn it, the pressure is good, the bore stays clean, and the mean deviation is low. I am happy with my load and will stick with it but as I am changing projectiles to 168 Sierra HPBT I will back off a grain and work back up, 0.1 grain increments and over my chrono until I hopefully get to 2950 fps again.