08-06-2011, 12:23 PM
StoneTower Wrote:The "chamber cast pic on the old forum " was the AA barrel that I referred to above that was ultimately set to AA and then back to the owner with a clean bill of health.
You would not by chance be fire forming 7.62x39 brass to 6.5 Grendel and trying to use that? When I did that I had to turn the necks as the CCS barrel has a tighter neck and the Winchester brass had extra thick necks when formed.
I am, actually. Though I have also used Lapua brass. It's been a while, but I seem to recall the same issue with the Lapua. I'll investigate further.
What brand of dies are you using?
Redding.
I encourage you to size a case a little at a time until it drops into the chamber and falls out freely if you invert the rifle with the action open. After you have this test case, seat a bullet a little deeper than you think that you need to. "Paint" the dummy round (bullet, neck and shoulder) with a Sharpie marker and mark the side of the case that faces the ejection port. Close the bolt and extract the round. Many times the loaded "dummy" round will be pulled against the barrel extension making what looks like rifling marks on the bullet and case neck, but there will be only 1 or 2 that have actually been created by the barrel extension. You can "paint" the scratches and try it as many times as you like.
I will try this. However it still leaves the issue of less headspace than my other two barrels. Though the issue would be simplified if I am mistaken about the rifling marks. I have tried this with one of the barrels, but I can't remember if it was this one. Probably was. But in the interest of being absolutely sure, I'll keep experimenting.
Best of luck,
David
[COLOR="navy"]Better yet, I'll use a Wolf case which seems to have a thinner neck. Size it short and I can eliminate all variables except the bullet.
Thanks,
Will[/COLOR]