Thread: over-pressured brass

Originally Posted by mikee

After reading this, I would suggest full length sizing (humor me) if you don have a die then send me 3-4 cases and I will size it and you can try
I also have 6.5GAP

Thanks Mikee, it is all good. I have no issue with norma brass so will stick to it. I was just curious why the over-pressured brass could cause accuracy problem. have a great weekend!

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.