IMR Enduron powders...

Beepy · February 26, 2016, 06:41 PM

A while back I picked up a couple pounds of IMR 4451 and a couple pounds of IMR4166 just for kicks and grins to see how well they shoot. Being a Metallic Silhouette competitor in Arizona, and a sometimes-hunter in South Dakota, I am interested in their temperature insensitivity and their reduction in copper fouling. Though those features are important, how they work accuracy wise is equally important, to me.

As I said, I am just getting started with my testing and I have already found a IMR 4451, 130 grain load for my .270 Winchester silhouette rifle that groups 1-3/4" at the 300 meters Javalina. Very promising indeed. Promising enough that I bought an 8# jug at the LGS.
From what I have read, 4451 is supposed to be good with 165/180/200 grain bullets in the .30-06, too. We'll see. I have lots of 165-168 grain bullets laying around.

I have only run one set of test loads on my favorite .308 and have a very promising load that is grouping 0.833" at 100 meters. I think we can tighten this up a bit with bullet seating depth adjustments, but will have to wait for a later date as I broke my left index finger last night just below the first knuckle. I am right handed, but holding the forearm of a moderate to heavy recoiling rifle is out of the question for awhile.

Anybody else been experimenting with these new powders?

jwrowland77 · February 26, 2016, 06:45 PM

I've had great success with 4166 in .308 Win.

Haven't seen any sensitivity to temp with it. I even stuck some in the freezer for a bit.

Here's a pic of best load when testing. 100yd.

The Old Salt · February 26, 2016, 08:30 PM

Nice looking group there! Did u chronologically the group?

jwrowland77 · February 26, 2016, 08:32 PM

I'm getting 2700fps with 178gr Hornady BTHP Match bullets.

And thank you.

Beepy · February 26, 2016, 10:39 PM

Dang! Nice shooting, JR!

I thought my initial .308 groups were good averaging 0.833"! I can see I have some more work to do.

jwrowland77 · February 26, 2016, 11:15 PM

Thanks Beepy. Lol

Roadkill2228 · February 27, 2016, 12:18 AM

I have a pound of 4451 and a pound of 7977 ready to go. Really loving what I'm seeing in hodgdons load data for 7977 with 150 grain .270 amd it looks to be a top performer on .300 win mag too. 4451 should be great in my .243 and with lighter bullets in the other 2. Hope it's everything it's cracked up to be.

Reloader2 · February 27, 2016, 12:16 PM

I scored a couple of pounds of 4955 last week. Yet to get to the reloading bench with it though.

hooligan1 · February 28, 2016, 05:41 AM

I'm running IMR 4451 in my 6.5-06 and it loves it, completely running over h4831sc in consistancy, which was decent.
I want to try 7977 in my 7 mag..

February 26, 2016, 06:41 PM	#1
Beepy Member Join Date: April 19, 2013 Location: Arizona Posts: 46	IMR Enduron powders... A while back I picked up a couple pounds of IMR 4451 and a couple pounds of IMR4166 just for kicks and grins to see how well they shoot. Being a Metallic Silhouette competitor in Arizona, and a sometimes-hunter in South Dakota, I am interested in their temperature insensitivity and their reduction in copper fouling. Though those features are important, how they work accuracy wise is equally important, to me. As I said, I am just getting started with my testing and I have already found a IMR 4451, 130 grain load for my .270 Winchester silhouette rifle that groups 1-3/4" at the 300 meters Javalina. Very promising indeed. Promising enough that I bought an 8# jug at the LGS. From what I have read, 4451 is supposed to be good with 165/180/200 grain bullets in the .30-06, too. We'll see. I have lots of 165-168 grain bullets laying around. I have only run one set of test loads on my favorite .308 and have a very promising load that is grouping 0.833" at 100 meters. I think we can tighten this up a bit with bullet seating depth adjustments, but will have to wait for a later date as I broke my left index finger last night just below the first knuckle. I am right handed, but holding the forearm of a moderate to heavy recoiling rifle is out of the question for awhile. Anybody else been experimenting with these new powders? Last edited by Beepy; February 26, 2016 at 10:41 PM.

February 26, 2016, 08:32 PM	#4
jwrowland77 Senior Member Join Date: March 23, 2012 Location: Conway, Arkansas Posts: 1,398	IMR Enduron powders... I'm getting 2700fps with 178gr Hornady BTHP Match bullets. And thank you.

February 28, 2016, 05:41 AM	#9
hooligan1 Senior Member Join Date: July 18, 2010 Location: Independence Missouri Posts: 4,593	I'm running IMR 4451 in my 6.5-06 and it loves it, completely running over h4831sc in consistancy, which was decent. I want to try 7977 in my 7 mag.. __________________ Keep your Axe sharp and your powder dry.

February 26, 2016, 06:45 PM	#2
jwrowland77 Senior Member Join Date: March 23, 2012 Location: Conway, Arkansas Posts: 1,398	I've had great success with 4166 in .308 Win. Haven't seen any sensitivity to temp with it. I even stuck some in the freezer for a bit. Here's a pic of best load when testing. 100yd.

February 26, 2016, 08:30 PM	#3
The Old Salt Member Join Date: January 2, 2015 Location: NW Missouri Posts: 57	Nice looking group there! Did u chronologically the group?

February 26, 2016, 10:39 PM	#5
Beepy Member Join Date: April 19, 2013 Location: Arizona Posts: 46	Dang! Nice shooting, JR! I thought my initial .308 groups were good averaging 0.833"! I can see I have some more work to do.

February 26, 2016, 11:15 PM	#6
jwrowland77 Senior Member Join Date: March 23, 2012 Location: Conway, Arkansas Posts: 1,398	Thanks Beepy. Lol

February 27, 2016, 12:18 AM	#7
Roadkill2228 Senior Member Join Date: March 8, 2014 Location: Nipawin, Saskatchewan Posts: 311	I have a pound of 4451 and a pound of 7977 ready to go. Really loving what I'm seeing in hodgdons load data for 7977 with 150 grain .270 amd it looks to be a top performer on .300 win mag too. 4451 should be great in my .243 and with lighter bullets in the other 2. Hope it's everything it's cracked up to be.

February 27, 2016, 12:16 PM	#8
Reloader2 Senior Member Join Date: June 18, 2013 Posts: 263	I scored a couple of pounds of 4955 last week. Yet to get to the reloading bench with it though.