Is there something undesirable about imr 4831?
- Thread starter Calvin45
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Calvin45
Well-Known Member
I'm tough in the cold and a complete and utter baby in any kind of heat haha. You can always dress for cold weather but there's a limit to how naked you're allowed to be in the heatIf you say pleasure of being in Ft McMurray in Jan/Feb you are one tough dude.
My accuracy never suffered with either powder, but for the same load I get better velocities with the IMR. I push the SAUM pretty hard just for the fun of it so the IMR works better for me when it comes to case capacity. I prefer to keep capacity as close to 100% as I can when I get to the sweet spot without too much compression. Both shoot really well.
You may be able to dress for Ft McMurray in Jan.........I cannot! I don't own enough clothes! If it wasn't for the oil field workers loaning me clothes, I would have died there!I'm tough in the cold and a complete and utter baby in any kind of heat haha. You can always dress for cold weather but there's a limit to how naked you're allowed to be in the heat
I've been there.
IMR worked sweet in my 280AI... at load development time anyway.
I'm at 60' above sea level with extreme temp swings.
I always developed loads when hot.
Printed dots. Dope right on.
Go out for hunting in dead winter cold OR hunt at 10,000 ft in Colorado... you'll have a change in POI due to temp and/or altitude.
Switched to "H" and solved most of these issues.
Run a short barrel and the games really begin!
It was 85 degrees and humid a couple of weeks ago in South LA when I left to go hunting in Missouri. Upon arrival in 20 degrees I had a dam near perfect zero when I test fired to check zero.
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Seabeeken
Well-Known Member
Ive tested quite a bit with 4166, 4451, and some 4955. What i learned was they pressure out suddenly and always, just before that, the groups tightened up. As odd as it may sound. A shame the enduron line was dropped. 4166 was one of my favorite powders. May go back to a few imr powders.
Calvin45
Well-Known Member
Yes I'm sad about that too. Big fan of 7977 and 8133, and they didn't seem so abruptly spiky as the faster ones
Wedgy
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When I work up my elk loads for Wyoming it may be in the 95F range here in the desert so I put them in a cooler on ice overnight then in a cooler at the range, about a 66 degree change that gives me a 30 fps swing. I don't think I have hunted elk in Wyoming when it's above freezing.
I agree.
I was a fan of 7977 as well.
Calvin45
Well-Known Member
By all accounts it was a perfectly acceptable H1000 substitute. Why the heck did they cancelled it!
That's exactly what I subbed it for and it worked really well!
If you've got several pounds of temp sensitive IMR, why not load and shoot in cooler weather and save the less sensitive for temp swing shooting? It will keep me shooting more and breaking in a new barrel, which is good thing.
Hugnot
Well-Known Member
I use IMR 4831 in mild temps in my 6mm AI using Sierra Data. I also use 54.0 grains in my .280 with 139's at 3000 fps +- 25 fps with good results. Works good for engaging a bunch or rodents at mild mid-May temps with a 6mm AI, 87 Vmax & IMR 4831 but when it is real cold or hot I use VN 165 or some carefully rationed RL23. IMR is an olde extruded powder that fits good within its niche - temperature range & big grains require careful powder dispensing to get uniform velocities.
R-S Hunter is a good alternative to IMR 4831.
R-S Hunter is a good alternative to IMR 4831.
Mikecr
Well-Known Member
Would sure be nice to know what 4831 is supposed to stand for..
