The short story is I had 8 pieces (out of 100) of Hornady 6.5 CM once fired brass from factory ammunition that would not pass a case gauge test After full length resizing. I caught this before reloading them. I FL resized them twice more ( once Hornady die, once RCBS die) But they still would not go all the way into either of two different case gauges. I measured with calipers but found nothing out of spec.
I chambered these 8 cases in both my 6.5 CM rifles with firing pin assembly removed and they had no resistance. Based on that I loaded them but kept them segregated.
with no change in scope setting I shot the pictured 5 shot group. With an overall measure of .460 and a center to center measure of .2 inch it is smallest group I have shot with this rifle. Normally I would expect .5 to .6 inch with this rifle so the fact it was so small is likely a statistical anomal.
Any thoughts on why these pieces of brass would not fully resize? I’m baffled.
For those that want more details
off the eight shells that would not resize I sent the other three rounds downrange and hit 10” steel at 500 yards. So typical performance
I chambered these 8 cases in both my 6.5 CM rifles with firing pin assembly removed and they had no resistance. Based on that I loaded them but kept them segregated.
with no change in scope setting I shot the pictured 5 shot group. With an overall measure of .460 and a center to center measure of .2 inch it is smallest group I have shot with this rifle. Normally I would expect .5 to .6 inch with this rifle so the fact it was so small is likely a statistical anomal.
Any thoughts on why these pieces of brass would not fully resize? I’m baffled.
For those that want more details
off the eight shells that would not resize I sent the other three rounds downrange and hit 10” steel at 500 yards. So typical performance