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waltherp88
04-03-2013, 12:05 AM
I bought .458 350 gr Red River bullets and was hoping to use them in my 458 Win Mag. I can find data for 385 gr and 300 gr cast but not 350,nor seating depth. I have Unique, 2400, Trailboss, Bullseye, 231 and IMR4895 powders on hand. Any help would be greatly appreciated.

nhrifle
04-03-2013, 12:25 AM
You will be safe using the data for the 385 grainers. Using data for a heavier projectile than you are loading is generally on the safe side. As far as seating depth, seat them long and then keep seating them deeper until they chamber freely. Use good common sense in all this though, and since you are in the development stage, be sure to take notes on everything.

Pirate69
05-01-2013, 10:19 PM
i want a 458 to play with until the shoulder in a light shade of purple!!:evil:

leftiye
05-02-2013, 03:46 AM
No problemo, can do!