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If there an equivalency chart showing what Enduron powders are similar too??

IMR 4320 = 4166

Any others??


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Thanx Swifty!!


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Except they mislabeled 8133 as 8933 and that’s also the only powder they don’t list a powder that it can replace. I have a pound of this and the list of cartridges with load data is all over the place and they don’t list the two I’d like some data for, 300WSM and 338 Win Mag.

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Originally Posted by Cowboybart
If there an equivalency chart showing what Enduron powders are similar too??

IMR 4320 = 4166

Any others??
hope you got all of it you want ,I dont know if you heard .But back in August IMR discontinued making the whole Enduron line.What is still in the system is all that is left to sell


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Yeah, really irksome....was working on converting multiple rifles over to this line of powders. Had several that showed a real love for 7977 and 8133....then, KAPUT!

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I agree War Eagle. Just as I was liking 8133 and needing to purchase more after it showed promise, no more. I can’t pick ‘em. At least my Razorbacks whipping KU so far tonight in Liberty bowl. SEC.

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I’ve had success replacing the 4350s with IMR4451 and the 4831s with IMR4495. I have IMR4166 I’ve not tried yet. I’m still hoping they reverse course on it and keep manufacturing.

It may be a tad slower. The deer in AL haven’t seemed to mind.

I like that it’s supposedly temp stable and less fouling. But margarine was also supposedly a healthy alternative. LOL!!!

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Originally Posted by DugE
I’ve had success replacing the 4350s with IMR4451 and the 4831s with IMR4495. I have IMR4166 I’ve not tried yet. I’m still hoping they reverse course on it and keep manufacturing.

It may be a tad slower. The deer in AL haven’t seemed to mind.

I like that it’s supposedly temp stable and less fouling. But margarine was also supposedly a healthy alternative. LOL!!!

At this juncture Hodgdon's doesn't have a choice. Enduron production was preempted by military contracts for powder.


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I came across 5 pounds of imr 8133. Bought it all. Found a place online that said it was similar to retumbo. Anyone confirm this.

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Originally Posted by Pickettpuncher
I came across 5 pounds of imr 8133. Bought it all. Found a place online that said it was similar to retumbo. Anyone confirm this.
I've never used 8133 but John Barsness lists it as working for some of the same loads as Retumbo in the 6.5 PRC.

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Originally Posted by bowmanh
Originally Posted by Pickettpuncher
I came across 5 pounds of imr 8133. Bought it all. Found a place online that said it was similar to retumbo. Anyone confirm this.
I've never used 8133 but John Barsness lists it as working for some of the same loads as Retumbo in the 6.5 PRC.
My goal is 264wm

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Originally Posted by Pickettpuncher
Originally Posted by bowmanh
Originally Posted by Pickettpuncher
I came across 5 pounds of imr 8133. Bought it all. Found a place online that said it was similar to retumbo. Anyone confirm this.
I've never used 8133 but John Barsness lists it as working for some of the same loads as Retumbo in the 6.5 PRC.
My goal is 264wm
Hodgdon has load data for 264. IIRC, I used 65 grains with a 140 gr accubond in my 264 a couple of years ago. Never chronoed it. Have about 2 lbs left

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yeah, I know they stopped making it - probably forever. Seems that it is a secret powder as nobody around me is buying it, so it is on the shelves.


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Originally Posted by Cowboybart
yeah, I know they stopped making it - probably forever. Seems that it is a secret powder as nobody around me is buying it, so it is on the shelves.
Are you referring to 8133? If so, I'd like their phone number. grin

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The burn rate chart is a good reference tool….

https://hodgdon.com/wp-content/uploads/2023-burn-rate-chart.pdf


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Originally Posted by War_Eagle
Yeah, really irksome....was working on converting multiple rifles over to this line of powders. Had several that showed a real love for 7977 and 8133....then, KAPUT!
If you ever made it up to michigan I might be able to sell ya a few pounds of 7977 if you wanted to stock up

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8133 has been excellent in a couple of different 7mm Rem Mags I've loaded. Accuracy and velocity...

Sigh...

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Stumbled onto this a couple of years ago.

[Linked Image from i.imgur.com]


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