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Thread: Accurate MR 3100

  1. #1
    Boolit Grand Master


    richhodg66's Avatar
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    Accurate MR 3100

    I have some of this and it appears to burn pretty close to IMR 4831 from the data I've found. Anybody have experience with it?

  2. #2
    Boolit Master
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    I used a good bit of it when it first became available, but only with jacketed bullets. As i recall, it was very slightly slower in burn rate than H4831 as I had to use a grain or two more powder to get the same velocities I was getting with H4831. Whether the burn rate changed over the years it was available, I don't know. Check the burn rate charts. Accuracy was comparable to H4831. MR3100 would not be my first choice for a cast bullet load, but it may work well with a case full. I doubt much, if any, of a powder weight reduction would be recommended from a safety perspective.

  3. #3
    Boolit Grand Master


    richhodg66's Avatar
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    Well, I have a good amount of it. I don't shoot a lot of jacketed bullets anymore, but do occasionally. I always found IMR4831 to be a good performer in the '06 back when I did shoot them.

    Planning to get started developing a deer load for the 6.5 Creedmoor and 4831 seems to be one of the recommended powders. When I got the rifle, I did some limited loading and found a 120 grain spire point and 37-38 grains of IMR4320 shot real well in it, but I'm thinking a heavier bullet and slower powder is the way to go.

    I also have that .25-06 and .270 I need to do something with.

  4. #4
    Boolit Master
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    In your situation, I'd call Western Powders (I think they distribute Accurate powders). I'll bet there is someone there that could give you the information you need.

  5. #5
    Boolit Master
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    I have about 4 lbs left in 8lb jug. Use it for jacketed bullets in .243, mostly 95 grain Partitions and 100 Sierra's, excellent accuracy in Savage 99 Featherweight .243, Under MOA. Pretty much reserve it for this rifle. It is my wife's antelope rifle, over the years it has taken 1 or 2 for over 15 years for her.

  6. #6
    Boolit Master

    rockrat's Avatar
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    I have and shoot its precursor, Accurates MRP. As you said, real close to 4831

  7. #7
    Boolit Buddy
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    I've always had good response from accurate when asking them about loads that are not in their load data, 180 degrees from responses from Alliant.
    the folks at western powders/accurate seem to do quite a bit of testing with cast bullets.

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check