7MM Brass Sizing Problem - 07/08/20
I'm guessing I'm missing something simple. It seems that happens more and more everyday. Anyway, here is my situation and my problem. I have some once fired 7MM Magnum brass. I guess it's possible some of it may be twice fired as I've had it for years; but, I think it is once fired. I was going to do some load work-up for another 7MM Magnum but the brass won't size to fit my rifle. O.K. more specifics.
1) Brass is both Winchester and Remington.
2) Factory rounds chamber great.
3) My sizing technique is to usually size the brass to fit the chamber rather than to size back to factory specs. However, I've finally gone so far as to screw the die all the way to the shell holder, lower the ram, and screw the die down even further, about 1/4 turn. The brass still will not chamber.
4) I thought, maybe it's just an empty brass problem with a push feed rifle; so, I seated bullets in three pieces of brass which were sized back to factory specs (not measured) and they still won't chamber.
5) As the brass was fired in various other 7MMs have they formed and brass-flowed such that I can't get them to fit this chamber or am I missing something?
Thanks in advance.
Max
1) Brass is both Winchester and Remington.
2) Factory rounds chamber great.
3) My sizing technique is to usually size the brass to fit the chamber rather than to size back to factory specs. However, I've finally gone so far as to screw the die all the way to the shell holder, lower the ram, and screw the die down even further, about 1/4 turn. The brass still will not chamber.
4) I thought, maybe it's just an empty brass problem with a push feed rifle; so, I seated bullets in three pieces of brass which were sized back to factory specs (not measured) and they still won't chamber.
5) As the brass was fired in various other 7MMs have they formed and brass-flowed such that I can't get them to fit this chamber or am I missing something?
Thanks in advance.
Max