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stewart33
12-26-2011, 10:52 PM
I have been shoppin' for go no go gauges for 7mm rm. midway has them as belted mags with 300wm, 338wm....etc. Are all these cals really headspaced the same?
memilanuk
12-26-2011, 11:14 PM
Yes, because those particular cartridges headspace off the belt, not the shoulder, at least officially. If you look at the actual gauges, they are short little stubs because of this.
stangfish
12-26-2011, 11:21 PM
Yes, because those particular cartridges headspace off the belt, not the shoulder, at least officially.

Pay very close attention to this part of his statement with respect to setting up your dies.
barrel-nut
12-26-2011, 11:26 PM
This is an excellent article on this topic:
http://www.shootingtimes.com/2011/01/04/ammunition_st_beltedcasebull_201007/
stewart33
12-27-2011, 12:36 AM
Thanx for the link BN . Interesting article, seems like quite a bit of extra case work. With the price of brass maybe it's worth it, not to mention the improved accuracy. I don't like muzzle brakes so I don't shoot my large caliber mags as much as I'd like. Just enough to stay proficient.