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Joined: Oct 2008
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I bought 8 lbs of this stuff for $100 and will try it in my 7mm Rem Mag. Anyone had good results with it?
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Joined: Feb 2002
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This was the original bulk powder of IMR4831. My lot was slower burning, so you could increase powder charges somewhat over I-4831.
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Joined: Jun 2006
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Campfire Regular
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Depending on the burn rate of your jug, it can be great stuff. I had an 8 pounder that produced stellar accuracy & velocity in 270's, a 6mm, and a 257AI. The next batch differed enough that I had to revisit my loads.
I have a batch of 140 gr AFrames loaded with that MR3100 that I am hoarding/holding for a moose hunt.
I now pretty much stick with 4831SC as it seems more consistent and has been more readily available.
I would expect pretty good results in your 7mm RM, particularly as you approach a full case of the stuff. Performance seems to improve with higher pressures.
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Works great in my 270 Win & 6.5 X 284
In my 22" 270 Win under 1" at 200 yards with 130 Gr 3100 FPS.
150 Gr under 1" at 200 yards 2900 FPS and both loads same elevation 3/4"
apart.
Hope I do not run out of MR 3100.
Last edited by kk alaska; 01/13/14.
kk alaska
Alaska 7 months of winter then 5 months of tourists
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Joined: Jul 2013
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I've burned a bunch of that powder. I think what I had was closer to H4831 in burn rate. Should work well in a 7mm RM, I think.
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