7mm ultra mag reloading

chukar_chaser

Lil-Rokslider
Joined
Jul 17, 2016
Messages
173
Location
Idaho falls , Idaho
I was gifted a 7mm Ultra Mag. I have done some research, the gun has a 1 in 9.5 twist. Would it be able to stabilize a 175 grain bullet? Does anyone have any experience reloading this caliber?
 
Yes, I owned one for a while.

I used Retumbo and the 160ab, f215m primers, Remington brass.

I was getting 3300+ with that combo and easily sub moa.

There isn't much you can't hunt with that setup.
 
How did your load turn out?
I loaded my 7RUM with 180 Berger VLD over Retumbo
and it was around .5 moa until the barrel toasted.
I've rebarreled to a 7PRC now expecting a much longer life.
 
Interested in this cartridge also. Going to be my next build. I have a 9 twist Proof and want to shoot 180 ELD-M’s. Will the speed of the 7 RUM stabilize this bullet? I am at 500 asl. Any info is appreciated.
 
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