loading the .458x2
im currently plotting a .458x2 mauser rifle , and have realized im going to have to reload to feed it, do any users have any experience loading this cartrige ? also is it safe to use trail boss powder in this rifle, i understand its a bulky powder for low velocity/pressure loads i think it will be just the ticket for plinking loads, but ive only seen this powder discussed in pistol reloading. is it safe to use and if not is there a powder out there that will give me a similar effect?
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