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7mm Rem. Mag.....what primer?

 
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  #1  
Old 01-17-2011, 10:17 PM
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Location: West Virginia
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7mm Rem. Mag.....what primer?

I have seen on here that some people don't use magnum primers for the 7mm RM. Is this pretty typical? Would LR primers work better for RL22, H1000, and Retumbo? I have Federal LR Match and Federal LR primers. As far as Mag primers I have CCI 250, and Winchester Magnum Rifle. What should I go with? Also, what is the difference between the LR and LR Match primers? Any info would be a great help.
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Old 01-17-2011, 11:51 PM
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Re: 7mm Rem. Mag.....what primer?

Quote:
Originally Posted by WV Sendero View Post
I have seen on here that some people don't use magnum primers for the 7mm RM. Is this pretty typical? Would LR primers work better for RL22, H1000, and Retumbo? I have Federal LR Match and Federal LR primers. As far as Mag primers I have CCI 250, and Winchester Magnum Rifle. What should I go with? Also, what is the difference between the LR and LR Match primers? Any info would be a great help.
There is a List of all the primers with there relitave heat somewhere on this site.with the Fed
215 being the hottest.

With that said I find that cases that have a powder capacity of 65 to 70 grains seem to get
better SD with a cooler primer as long as you are not using a slow burning powder (Like
H50 BMG and H 869).

My best 1000 yard load for the 7mm rem mag was H 4831 and a Remington 9 1/2 mag primer
and 168grain SMKs (There are 3 or 4 other primers that are hotter).

When I tried the 215s it bumped the velocity up but the SDs also went up (SDs were 9 with
the 9 1/2s and it went to over 30 with the fed 210s)

The cases with a capacity of over 100 like the 215s and the 215ms(A little cooler than the
215s).

Some powders are harder to ignite and some experimenting may be nessary.

J E CUSTOM
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Old 01-18-2011, 05:29 PM
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Re: 7mm Rem. Mag.....what primer?

If accuracy is of the most importance i'd go for CCI BR-2's and RE22 but the CCI 250's will probably do ok, like I mentioned in another thread the 250's are all but identical to 210M's.
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Old 01-18-2011, 05:59 PM
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Re: 7mm Rem. Mag.....what primer?

I use cci 250 primers. They work well With Imr7828 in my gun. But to each his own they my not work well for what you may work up.
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Old 01-18-2011, 06:08 PM
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Re: 7mm Rem. Mag.....what primer?

i usually use wlrm, occasionally 250s or 9.5m. i do not use std primers in a 7mm mag.
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  #6  
Old 01-18-2011, 07:21 PM
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Re: 7mm Rem. Mag.....what primer?

just depends on the load, i gained 60fps over a magnum primer with a winchester non mag but that is with fairly fast powder like rl-15, using rl-22 it might be different just have to chrono and see what shoots best
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Old 01-18-2011, 08:56 PM
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Location: NC mountains
Posts: 508
Re: 7mm Rem. Mag.....what primer?

Haven't loaded yet, but gonna use Federal 215s, Winchester brass, H1000, and 168g SMKs. Gonna chrono them so we'll see.
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