Enduron powders?

Alderman

Handloader
Apr 5, 2014
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Just wondering who is using Enduron powders, (What powder, what cartridge, results)?


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270 Win

60 gr IMR 7977 - 150 gr Ballistic Tip - 2900 +/- fps - my deer load, still tweaking it but it shoots well.
60 gr IMR 7977 - 160 gr Partition - 2817 fps - shoots well and makes a great heavy game load.

7mm Rem Mag

70 gr IMR 7977 - 154 gr Hornady Spire Point did not chronograph but it shot well.
60 gr IMR 4451 - 154 gr Hornady Spire Point did not chronograph but it also shot well. Kicked noticeably less than the IMR 7977 load.

260 Rem

43 gr IMR 4451 - 129 gr Hornady Spire Point - 2862 fps - shot decently.
43 gr IMR 4451 - 130 gr Sierra HPBT - 2899 fps - shot quite well but a tad warm, going to reduce it to 42.5 gr.

6.5x55

46 gr IMR IMR 4955 - 140 gr Partition and 140 gr AccuBond - both were just under 2700 fps and shot well.


I tried IMR 4955 in my 270 Win with 150 gr Speer's and somehow blew a primer even though I was below max. Not sure what happened since there was no other signs it was going to pop the primer. Based on that I would definitely start low and work up if using Hodgdon's data.

I tried IMR 4451 in a 30-06 and had fair results with 165 gr Speer and 180 gr Sierra flat base bullets, others have had excellent results in their 30-06's.
 
I have worked up a couple loads for my .30-06 with 4166. It seemed to shoot well, very similar to 4064 in the load data.
 
I'm not sure what you your request for results mean - velocity, accuracy, ease of cleaning, ease of metering, etc. etc.

I whole heartedly agree with Gerry that you need to start at the starting loads and work up carefully using the Enduron powders. IMR 4955 has been weird for me, very fast and in the 30-06 it has been just plain ornery.

Chargemaster 1500 doesn't seem to have any issues with IMR 4955 and 4451... I do use a reducer though.

I'm not seeing reduced copper fouling and powder fouling seems rather heavy. IMR 4451 seems to be fairly temp stable in the 30-06 while IMR 4955 seems much more temperamental.

I have a relatively light load of IMR 4451 in 30-06 with 165 grain Core-Lokt. Velocity is in the 2600 fps range, but accuracy tends between 1"-1.5" at 175 yards between two rifles and it is primarily a plinking / practice / young rifleman load. I also have a pretty decent load with 180 grain Nosler Partitions as well; nothing spectacular though in the accuracy or velocity departments. Seems like a decent substitute for H4350 or IMR 4350 in most applications.

57.8-58.2 grains of IMR 4955 in my 30-06 using 180 grain Nosler Partitions gives me around 2800 fps (optical crony consistently gives 2750 - 2820 fps around 60-70 degree days, but have had data hovering around 2650 fps on a 40 degree morning). Accuracy has been poor and inconsistent ranging from 1 MOA at best to about 2 MOA at worst for 4 shots at 100 and 175 yards. 61 grains with a cup and core bullet is supposed to give about 2830 fps per the 2016 Hodgdon manual - so I'm way out of line.

IMR 4955 in my 280 Remington using 175 grain Nosler Partitions like wise is giving me much higher velocity than anticipated but no pressure signs on the brass going up to 53.8 grains of IMR 4955. 52.8 grains gives me about 2650-2680 fps between 40-70 degrees, so it looks to have good temp stability in my rifle. Accuracy is fair to midland.

Edited to remove fluff...
 
This is all the kind of info I'm interested in.
I weigh all of my charges on a balance beam so I usually throw a light charge and trickle the rest.
Interesting on the temp. sensitivity.
Curious if standard deviation and extreme spread were consistent at both temperatures.
I'm thinking a 180 grain bullet kicking off at 2800 would do all and more of what I need.
I just don't see a lot of info on these powders from real world users and I think the pro writers like to make things look good no matter what they are using.


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Agree on the pro writers making things look good no matter what. They normally need money, so I tend towards real world user feedback as well.

I'll pm you a few links on temp stability... General thoughts is that there are large inconsistencies between lots like RL-22, primer sensitivity and or detergents aka anti-coppering agents being tough to get into and keep in an optimal burn or pressure curve. For example IMR 4955 seems to be rather temp sensitive with 30-06 based cases, but seems pretty happy with light magnums.

Sadly I can't help on the ES or SD, my optical chronograph is a bit too sensitive to shadows and environmental conditions to really have much faith in the numbers.
 
I like IMR 4451 and 7977 quite a bit, unsure about 4955 at this time have heard of a few issues with it being hotter than expected.
 
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