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Reloading for the 300 Win Mag


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Hi guys,

I am new to the forum. I have been shooting the Super Black Eagle for years and have decided to buy a R1 in 300 Win Mag. I live in Upstate New York, was born and raised here and have decided to move to Nebraska. I wanted a good long range gun seeing I will be hunting the plains and open country. Also might try for some Elk someday.

Anyhow I was wondering if anyone good give me some advice on reloading for the R1 in 300 Win Mag?

I bought some 180grain SST bullets and was wondering if I should stick to medium burning powders as I have read that should be used? Seems like all my reloading info has loads for slower powders, as I would say that it is due to the magnum round?

Also is the brass pretty much spent after firing it in the R!?

Crimp? SST have the crimp ring so I will slightly roll crimp them, but what about Accubond bullets?

Thanks in advance for all the help. I want to start off on the right track. Thanks!


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I am working on my dads 300 win. It likes H4350 the best with 165 hornady sp's and the 180 grain tsx. I did not crimp the cases. Full length size them and trim when needed. I would stay away from Federal brass. Myself, I have had too many split cases in all calibers and do not use them for reloading. Make sure you seat them deep enough to fit in the magazine. I made that mistake I could have used them in a bolt gun but not the R1. Hope this helps.

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Thanks for the advice! Right now I have all my stuff packed for my move but will be getting some loads worked up come mid summer. I did buy 2 boxes of factory rounds just so I can get out with the gun sooner and get some shooting in.


Can you reload your brass after its fired through your R1?


Thanks again!

Edited by CoyoteCarbine223
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