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Mixing IMR & Hodgdon powders (Read 1350 times)

John Schluter Junior Member Offline Posts: 66 Location: Fredericksburg, TX Joined: Mar 4^th, 2013	Mixing IMR & Hodgdon powders Dec 19^th, 2022 at 6:11pm	Print Post
	I have partial batches of Trailboss, one from IMR and another from Hodgdon after the acquisition of IMR. Can these batches be thoroughly mixed and used for low to medium loads of 45 LC? I know that the same powders from the two mfgs. tend to differ slightly in burn rate but can carefully playing work up produce workable loads?


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marlinguy Frequent Elocutionist Offline Ballards may be weaker, but they sure are neater! Posts: 16079 Location: Oregon Joined: Feb 2^nd, 2009	Re: Mixing IMR & Hodgdon powders Reply #1 - Dec 20^th, 2022 at 11:16am	Print Post
	They are both extremely similar, but I don't mix them myself. I simply use all of one container up, and then switch to the next. Never saw any reason to mix them together as the only advantage would be saving space in my powder cabinet.

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uscra112 Frequent Elocutionist Offline Posts: 4079 Location: Switzerland of Ohio Joined: May 7^th, 2007	Re: Mixing IMR & Hodgdon powders Reply #2 - Dec 20^th, 2022 at 12:02pm	Print Post
	Is it not the case that powder makers blend two or three lots of a given powder to get the performance within canister powder specs?

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JLouis Frequent Elocutionist Offline Posts: 10625 Joined: Apr 8^th, 2009	Re: Mixing IMR & Hodgdon powders Reply #3 - Dec 20^th, 2022 at 6:01pm	Print Post
	Myself I would not personally do that myself.

	" It Is Better To Now Have Been A Has Been Than A Never Was Or A Wanna Be "
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rgchristensen Frequent Elocutionist Offline Posts: 1088 Joined: Jan 2^nd, 2014	Re: Mixing IMR & Hodgdon powders Reply #4 - Dec 21^st, 2022 at 7:17am	Print Post
	The mixing of granular solids to attain a homogeneous composition is not a trivial process. CHRIS


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boats Frequent Elocutionist Offline Posts: 7545 Location: Virginia Joined: Apr 23^rd, 2004	Re: Mixing IMR & Hodgdon powders Reply #5 - Dec 21^st, 2022 at 7:44am	Print Post
	I keep my supply of 4227 separated, Australian and Canadian made. Impression, many not be fact, point of impact slightly different, could be just temperatures when used. Recent small amount of each left in cans. Mixed them, marked as mix, will use for offhand practice loads . As Chris says proper mix not easy to obtain. Boats


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Green_Frog Frequent Elocutionist Offline "It ain't easy being green" ASSRA Life #281 Posts: 4018 Location: Lynchburg, VA Joined: Apr 18^th, 2004	Re: Mixing IMR & Hodgdon powders Reply #6 - Dec 21^st, 2022 at 9:59am	Print Post
	My personal practice is to avoid mixing lots of even the same smokeless powder. At the pressure ranges we generally load, it would probably not be dangerous, but I don’t want to risk it. YMMV, but that’s my way of doing things. Why not use up one lot then use the next? Is it all that important to take one can or jug off the shelf? Froggie


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jgraham1 Participating Member Offline Posts: 31 Location: Dayton, Wyoming Joined: Aug 8^th, 2010	Re: Mixing IMR & Hodgdon powders Reply #7 - Dec 21^st, 2022 at 10:22am	Print Post
	I would not do that, too much of a chance of mixing it improperly and having an issue with pressure. Jerry


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marlinguy Frequent Elocutionist Offline Ballards may be weaker, but they sure are neater! Posts: 16079 Location: Oregon Joined: Feb 2^nd, 2009	Re: Mixing IMR & Hodgdon powders Reply #8 - Dec 21^st, 2022 at 11:36am	Print Post
	I don't avoid it due to any concerns of danger. I just don't see any reason to do it? It seems like just another step not needed. It's easier to just use one lot up, and then open or start on the next one.

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Cbashooter Frequent Elocutionist Offline Posts: 1570 Location: Eastern Wa. Joined: Mar 31^st, 2018	Re: Mixing IMR & Hodgdon powders Reply #9 - Dec 21^st, 2022 at 1:48pm	Print Post
	ssdave- I removed my previous posts due to seeming like I was giving dangerous advice based on others responses. thanks for your post, my experience and procedure is exactly as yours.


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oneatatime Frequent Elocutionist Offline Posts: 3865 Location: Rocky Mountains Joined: Oct 30^th, 2011	Re: Mixing IMR & Hodgdon powders Reply #10 - Dec 21^st, 2022 at 8:03pm	Print Post
	"better than changing cans and finding the load substantially changes" So much for makers blending to be within specs for a powder. They must have some generous specs. I started a new can of 4320 and had to change my load by 3 grains to get back anywhere near my original. If I had blended the two cans before I worked up the first load it would have saved me a lot of time and material.


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desert-dude Senior Forum Member Offline Posts: 439 Location: Selah Joined: Jul 23^rd, 2013	Re: Mixing IMR & Hodgdon powders Reply #11 - Dec 30^th, 2022 at 12:19pm	Print Post
	As far as I can tell IMR and Hodgdon Trail Boss are identical. AUS Alliant -> IMR -> Hodgdon. Loading a few with power from each can, exercising caution to be well below max charge should establish differences. Lot to lot differences can't be too much or the published load data would be useless. For the really suspicious or paranoid finding someone with a pressure trace setup would solve the problem with more certainty. But there is the famous quote: "Not everything you read on the internet is true" A Lincoln.


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