by Stoney » 10 Dec 2018, 7:54 pm
G'day Fellas, I have a question for the .303 reloaders here who would care to help me with a bit of a mystery. So, I recently loaded an extensive batch of ammo to test in 2 of my 303's. 100 grain Hornady .312 XTR pistol round for plinking, with Trail boss and AR2206H. 130 grain Woodleigh PPSN with BM2, AR2206H and AR2208, 174 Hornady RN with AR2206H, AR2208 and AR2209. Also Hawksbury River 180 grain cast with AR2206H and Trail Boss. So, I shot the 174 grain Hornady's in 5 shot groups respectively. All good. I then shoot the 130 grain Woodleigh PPSN in BM2 and notice the primer has backed out above the rim. I stop shooting that load and go to AR2206H load, shoot one and the primer backs out very proud. So I stop shooting that load. I move to the 100 grain loads and all good. I then swap guns and fire the cast loads in my other .303 and the AR2206H load is good but the Trail Boss load the primer is backed out again. Every round was a brand new Hornady un-fired brass. Both bolts on both rifles were not hard to open at all. All loads were minimum starter loads. Is this common to the .303? Cheers.