Neck sizing question

[Adam Helmer]

Allen,

You got good advice to your question. If you get your friend's brass, full length resize it. I custom size all my reloads for a specific rifle and note it on the packing slip with the reloads. I back off my resizing die a quarter turn, or so, for all my rifles and then try the sized brass in the specific rifle. If it doesn't chamber with only a slight "crunch" fit, I lower the sizer die a bit and try again until it chambers easily.

I have used this technique for all my Garands, three Match M14s and all other rifles for years without a problem. Last week a buddy asked me to load him some .300 Weatherby ammo when he dropped off the dies and cases. I told him I needed his rifle to set the sizer die. He dropped off the Remington 700 yesterday, so now I can proceed. There is no need to oversize rifle brass: doing so will shorten 7mm RM brass case life. The .303 British brass is another round that can do with minimum case resizing. I keep an info sheet in each die box listing how far to back off the sizer for individual rifles that is confirmed at the bench with the rifle handy.

Adam