Hey all, had an issue over the weekend with my 6.5x47 and think I figured out the issue, just don't know why it's happening. Some background, I am on the 10th firing and my reloading process has been as follows:
Decap, wet tumble, anneal with AMP, resize using a Redding FL bushing die (287-loaded OD is 290) to bump 0.002, dry tumble imperial wax off, run through carbide neck turning mandrel, trim on giraud (really just chamfer and debur), prime, charge, and seat. This process has yielded great results with single digit SDs and ES.
So I went to the range to play with my load because good is never good enough and I had half the rounds not chamber (bolt know would not close). Came home and checked headspace measurement from datum to make sure they bumped and that was good. Check neck diameter since this was a new lot of 140 hybrids and it was still .2895-.290. Checked base to ogive dimension and it was 0.020 from lands. I was a little perplexed. So I measured the very end of the case mouth and it was 2915 (which is the same as my fired brass). Narrowed it down to my mandrel step, when putting brass through it, it is flaring the case mouth where the neck will be 288 but the mouth is 291-2915 depending on debur.
Could this be a function of the die set up incorrectly? I had moved the die body (Sinclair gen II) but wouldn't think so as long as the mandrel is fully expanding the neck. Sorry for the long winded post.
Decap, wet tumble, anneal with AMP, resize using a Redding FL bushing die (287-loaded OD is 290) to bump 0.002, dry tumble imperial wax off, run through carbide neck turning mandrel, trim on giraud (really just chamfer and debur), prime, charge, and seat. This process has yielded great results with single digit SDs and ES.
So I went to the range to play with my load because good is never good enough and I had half the rounds not chamber (bolt know would not close). Came home and checked headspace measurement from datum to make sure they bumped and that was good. Check neck diameter since this was a new lot of 140 hybrids and it was still .2895-.290. Checked base to ogive dimension and it was 0.020 from lands. I was a little perplexed. So I measured the very end of the case mouth and it was 2915 (which is the same as my fired brass). Narrowed it down to my mandrel step, when putting brass through it, it is flaring the case mouth where the neck will be 288 but the mouth is 291-2915 depending on debur.
Could this be a function of the die set up incorrectly? I had moved the die body (Sinclair gen II) but wouldn't think so as long as the mandrel is fully expanding the neck. Sorry for the long winded post.
