7mm mag powder question

62 grains of reloder 22 with 160 grain spbt bullets is the best that I have found. Just finished reloading 50 of them. Going to try 61.5 and 62.5 grains next time I have a chance. They are all loaded and itching to fly!!!!
 
I use IMR 7828 SSC . I use 61.0 grains of 7828 ssc with a 160 grain Barnes x flat base bullet . I shoot key hole groups every time . I bump up the grains to 65.0 for elk or moose . I hope this helps Joe Lafortune CD

I have a bunch of 7828, I will have to try it.
 
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