salmonchaser
Ammo Smith
- Dec 13, 2013
- 6,071
- 8,773
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I've only encountered that issue with 10mm, but more of a case than neck separation. I've even shot 357sig in a 40s&w and still hit the target at 50 yards. I could tell when it ejected that something was odd.Resizing some 257 Roberts and encountered a neck separation I don't recall ever seeing before. 3x loaded Nosler +p brass.
Glad it's not stock in the rifle.
I have not gone down that rabbit hole yetVery unusual Don. Maybe a bad piece of brass. Do you anneal your brass?
JD338
Nothing unusual. No shoulder growth to speak of new brass to once fired to resize, it appears the rifle and sammi specs all agree. Random checking shows just about .002 shoulder change on firing. Necks are lubed for sizing. Primer pockets are still tight, the pressure it takes to seat a primer with these is the same for several other cartridges, no other pressure signs, in fact I have loaded other cases to 257AI pressure but these were never loaded hot.I’ve had more trouble with the little bit of nosler brass giving up the ghost prematurely than ADG and Peterson combined, in many more cartridges. No visible pressure signs then releasing the primer next firing for instance.?
Just screwy, with no warning.