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Old 04-11-2018, 10:55 PM
N8232J N8232J is offline
Join Date: Feb 2018
Posts: 157
Default IMR4166/Garand current thinking?

New M1 loader here.

I've loaded for bolt rifles for some time, and have researched the requirements for loading safe ammunition for the Garand.

First range session went pretty well, and other than being a little rough on brass the things are a hoot to shoot.

I've started with the usual H4895 and IMR4064 powders. They work fine, but we all like to tinker.

All I can find on IMR4166 is old news, somewhat alarmist, and written when the powder was apparently new to the market. The idea of a copper fouling reducer built in to the propellant is intriguing.

Does anyone use this stuff?
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Old 04-12-2018, 09:23 AM
GM1MAN GM1MAN is offline
Join Date: Oct 2014
Location: South & North
Posts: 1,299

I have not used it, but according to some of the web sites it is a fast burning powder???

In the Hornady #10 Manual it is listed as being #87 in speed just ahead of #88 IMR 4064 powder. So that doesn't seem too bad to me.

I haven't tried any as I have been lucky enough to get Varget and IMR 4064.

Others will chime in for sure.
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Old 04-12-2018, 11:22 AM
DJEinConcord DJEinConcord is offline
Join Date: Oct 2009
Location: Concord, CA
Posts: 1,075

I used it in 308 for FTR class with excellent results. Load development revealed very small accuracy nodes. Work it up til you find a node and then increment no more than .2 grains to fine tune. Does not meter well.

That said i am interested in 30-06 loads. Have not had time...
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Old 04-12-2018, 09:12 PM
N8232J N8232J is offline
Join Date: Feb 2018
Posts: 157

Thank-you for that DJE.

In a thread that dates to 10 of 2015, a member here called MZ5 was headed off to test this new and wonderful powder.

Then the thread ended.

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Old 04-13-2018, 09:50 AM
goryshaw goryshaw is offline
Join Date: Jun 2013
Location: Utah
Posts: 121

I've been using it for a couple years; 46.5 gr with Nosler 168 gr CC. It holds the black on a SR-1 as long as I do my part, generally windage is 10 ring, but elevation tends to creep into the 8 ring, but I suspect that is my position shifting rather than the ammunition.

Definitely less fouling than HXP, and the de-coppering agent seems to work, cleaning with Patch Out gets little if any blue on the patches.
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Old 04-18-2018, 09:51 PM
Dusty31 Dusty31 is offline
Join Date: Dec 2015
Location: Nebraska
Posts: 525

I've dabbled with 4166 for the M1, been working my way through an 8 pounder I bought when it first came out.

Two separate acquaintances in the industry have commented on notable inconsistent lot-to-lot performance with it. I can't say I've experienced that, still working from the same lot.
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