I'm guessing the word "Magnum" on caps is like "Organic" on tomatoes, they get to charge more for the product. I don't see the difference?
Good morning. I too have wondered about the Magnum designation, most all reports I've read mentioned that there is problems with 777 powder if you don't use Magnum primers. Due to the problem of finding blackpowder where I live, I decided to see if Hodgdon 777 would work satisfactory. Well, on my new traditions percussion, Magnum #11 primers fit loose, so I have to be careful about them jumping back off and they have a tendency to stick inside the hammer after I've shot, very frustrating. Being I have a bunch of regular #10 primers, I thought I should see what happens. Well, so far good news. They stay on better, have had no misfires, and they don't jump off and stick inside the hammer, but generally just stay on the nipple after I have shot. I'm sure more testing is required, I think that I've 15 shots so far. Like all good theories, time will tell.
Squint