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Old 08-27-2014, 14:13   #1
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AR-15 and IMR3031

Anybody using IMR3031 in a full size AR-15?

It's a little bit slower than IMR4198 and that stuff absolutely doesn't work in a full size AR. It works ok on a shorter gas tube but that kind of restricts its utility.

The reason I ask is that I have a source for 8#ers of IMR 3031 but if they don't work in a full size AR, I'll just give it a pass.

Same question, different gun: Does IMR 3031 work in an M1A with, say, 168 gr BTHP bullets? I'm kind of flexible on the bullet weight but I have 168 and 175 gr BTHPs on hand.

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Richard
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Old 08-28-2014, 15:33   #2
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IMR3031 has worked great for me in .223 with 55-62 gn bullets. All my ARs are 16" so can't say about the 20". I've also used it in .308 with bullets in the 150-168gn range. It was very accurate in both. Only problem is, it doesn't meter well. I have found it to meter better in my Lee measure than my RCBS. Either way I had to trickle to final charge weight. Because of this, it's not a good powder to load on a progressive. That's the reason I moved away from 3031. If you don't load on a progressive, and don't mind weighing every charge it'll work for you.
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Old 08-28-2014, 16:06   #3
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I have used a couple of pounds of 3031 over the years but, at the time, I was hand weighing charges. Today it would definitely be a progressive - especially for the .223.

So, I went back to the range and bought up a bunch of BLC(2) instead... I think I'll like it a little better for .223.

Richard
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Old 08-28-2014, 20:59   #4
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For your m1a with the 168 and 175'. Sure. 3031 has always been a popular service rifle powder.
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