Thread: over-pressured brass

Originally Posted by overflow50

What neck dimension is your 6.5 SAUM?

I have a 6.5 SAUM with 0.296 NK that I can’t run Bertram brass in, necks are too thick (major pressure signs even at what should be start loads).

Didn’t bother to neck turn to see if that fixed it as ADG brass had a thinner neck and has given great accuracy.

Hi overflow50, mine is 0.2962, so same as yours. GAP later released 0.298 neck reamer, which you can use normal cases without neck turning. I neck case down from 300 saum so neck turning is a must. will check the ADG brass, thanks.

I used a 7 saum bushing dies for my gap4s and adg brass never had an issue