Re: Anyone own a 7mm 300 Win Mag?
Hi Broz, yes, definitely.
Here are some specs:
Parent .300 Win mag design
Max case length 2.620"
Max case length 2.657"
So I am .037 longer in the neck than the .300 (its actually a nice round figure in metric!)
Be sure to clean the chamber properly when cases are short to avoid carbon caking. This can happen with any over trimmed brass, culling loads are a classic example. If the chamber gets caked, the neck is unable to expand properly and pressures go up, resulting in fliers. Also happens with under powered loads that don't obturate properly. Rem .260 and 7mm08 factory ammo (pre-2001) is a classic example of underloaded ammo that caused carbon caking. A lot of guys sold off their rifles without ever having known that this was a cause of fliers. Easy to test, just pop a bullet in a once fired case, make sure it passes in and out of the case neck easily, you know, usual stuff.