300 RUM Killer load


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deadly50bmg
November 2, 2005, 12:28 PM
Just saw this from sierra and ran it on my ballistics program. Check out their 240gr Matchking...Now look at its sectional density and Ballistic coefficient!:what: :what: :what: Plug those numbers into your Balistics program for a 300 RUM. Talk about some down range punch!!

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WHITEY338
November 2, 2005, 04:19 PM
The only problem with a Matchking is that you can't (read shouldn't) shoot any game animals with it. I have seen it done by someone who knew better and paid for it with a lost 30" mule deer the bullet, as near as we could tell, blew up on the shoulder. The best bullet on the market for hunting purposes in .308" is the Nosler Accu-bond the B.C. is .588. The only way to better that is to spend a lot of money on Lost River J36 bullets 180 grain B.C. of .672. but it is the absolute bst way to wring distance and every scrap of energy out of a given round.

Zak Smith
November 2, 2005, 05:57 PM
And what kind of barrel life do you get?

steveno
November 2, 2005, 06:12 PM
I wonder what twist you would have to use to stabilze the 240 gr matchking? I doubt that the 1 in 10 would work with a bullet that long

WHITEY338
November 3, 2005, 10:59 PM
They like to see 1 in 8" for anything above 220 grains or with exceptionally long bullets. And as far as barrel life goes even with a grossly over bore round (albeit impressive) when you throw bullets that are 60 grains heavier than the "norm" you are going to get the "sandblasting" that occurs with bullets of 168 grains or lighter. Should be at least 2000 rounds before accuracy falls of enough to where is going to be a problem. But then again there's barrel care; cleaning frequency, continual shooting when the barrel is hot, improper powder selection, etc.

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