Re: Fed large mag v/s match mag primers
The story is that the match grade primers are manufactured with some additional efforts to increase the primer to primer consistency - power/temperature/burn rate. I go with the match primers since they don't cost too much extra, but I've never really seen any research demonstrating the tangible improvements over their regular grade of primers. Since primers are so tough to get right now, I wouldn't hesitate to use the regular large rifle magnum primers. I'm not sure you'll measure any difference in group size on your targets.