Primer Question

[clancy12]

I've got a box of Fed 215 primers, but one load I was looking at called for WLRM and another for Rem 9 1/2M. If I put Fed 215 primers in instead, do I have to alter the powder loads or won't it change the pressure much? Thanks.

 

[rfwobbly]

By my information, all 3 should be equivalent Large Rifle Magnum Primers.

 

[243winxb]

Use the suggested starting load of powder and work up as always. If you already have a maximum load your using, reduce the powder charge when changing any component.

 

[gamestalker]

My experience has indicated that powders that list a magnum primer being used have not function very well and actually produced signs of higher pressures. A magnum apllication that lists a magnum primer and is substituted with a standard LRP can produce unpredictable pressure spikes not to mention a host of other undesirable performance.
I loaded some 7mm rem. mag using RL22 and substituted LRP for LRMP during the big shortage a while back and was really shocked at the results. Not only did I get a good amount of unburned and stiull burning powder blown back into my face, extreme variances though the chrony, but I also experienced some very flat primers, and I do mean flat, as in they filled the entire pocket to the edges. Extraction was quite stiff as well, which was enough for me to never substitute a SAMMI recomended primer application ever again regardless of ow many stories I hear about primer type's not being important enough to worry about. Maybe a primer can be substituted when using light to mid range powders, I don't know, but I'm convinced it's not a direction I'll ever explore again.