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Reloading Berger Bullets


Fire-forming reduced loads for RUM

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Unread 06-09-2009, 01:55 AM
Junior Member
Join Date: Apr 2009
Posts: 9
Fire-forming reduced loads for RUM

I have three 300 RUMs, two 338 RUMS and a 375 RUM. Given they burn at 63K PSI the brass can only be reloaded about 3 times. I'd like a reduced load I can use for fire-forming + plinking. My Speer reloading manual (#10, 1977) has reduced loads using SR 4759 (RUM not invented yet) - and the latest Speer manual (#14) is sold out.

I'd like some reduced loads that won't take away one of the 4 lives of the brass. I know that reduced loads don't guaranteed reduced maximum pressure, but I should be able to find a load that can be used for target shooting + fire-froming + not stress the brass.
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Unread 06-09-2009, 09:22 PM
Platinum Member
Join Date: Jan 2003
Location: The rifle range, or archery range or behind the computer in Alaska
Posts: 3,830
Re: Fire-forming reduced loads for RUM

90.0-95.0 grains of H50BMG under 178 AMAX's in the 300 RUM are good accurate mild loads.

If sized properly, you sure can get more than 3 firings from an RUM case.
Long range shooting is a process that ends with a result. Once you start to focus on the result (how bad your last shot was, how big the group is going to be, what your buck will score, what your match score is, what place you are in...) then you loose the capacity to focus on the process.
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