Originally Posted by WV Sendero
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
Some powders are harder to ignite and some experimenting may be nessary.
J E CUSTOM