It seems that every load I try in my 7600 Whelen carbine flattens primers. Even when I'm a grain or two from max. Extraction isnt hard at all and accuracy is pretty good but it always flattens primers. Could it be excessive head space?
Today I ran 57 and 58 gr of 8208XBR under 200gr TTSX with fed LR primers at about 2715fps (both loads velocity didn't change?) accuracy was decent but flattened the primers.
57.5gr of AA2460 shot a little bug hole @ 2700fps but still flat primers. Annnnd I'm told 2460 is NOT a good temp stable powder for the cold where I hunt.
60gr of TAC had good accuracy but still flat primers....this load runs from 2640-2800!!!?? Wtf that's some spread!
Any thoughts?
Last edited by skybuster20ga; 09/03/17.
