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Thread: Anyone using IMR 7828?

  1. #1
    Member Float Pilot's Avatar
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    Default Anyone using IMR 7828?

    I just loaded up a bunch of 300 Win Mag loads using IMR 7828. I have not made it to the range yet. (Water well pump going bad at the house, things need fixin)

    I was wondering if anyone else has used this powder much and what they think.
    Floatplane,Tailwheel and Firearms Instructor- Dragonfly Aero
    Experimental Hand-Loader, NRA Life Member
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  2. #2
    Member Alangaq's Avatar
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    Default

    that is a new one on me. I dont recall ever seeing it in my re-loading data, but my stuff is a few years old. Please post back with your results.
    “You’ve gotten soft. You’re like one of those police dogs who’s released in to the wild and gets eaten by a deer or something.” Bill McNeal of News Radio

  3. #3
    Member Whelenator's Avatar
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    Wink 7828

    Of course I've used 7828. Just about anyone that's loaded for a fast belted magnum has used that one. it's a pretty slow burning powder, and is better for your 300 with say 180 grain and higher. 7828 doesn't do as well with bullets in the lightweight range for each caliber you would use it in. Go to your loading manual and check 150 grain loads for the 300 Win Mag. It isn't even listed in the 150 and 165 Sierra data. I just checked that. But it is listed for the 180 grain bullets. It is a great powder, just like most of them. Powder choices are limitless for a lot of calibers, you just have to try a few tried and true combinations and see what works in YOUR rifle. 7828 might treat you well in your gun, but may hate me.

  4. #4

    Default 7828

    I used it for 200 grain loads in the 300 win mag with a 30" barrel. Velocity and accuracy was excellent. Pressure symptoms came on well below the published loads in the sierra manual. (might have just been this rifle) I found wide discrepencies in pressure and velocity with tempature variation. I thought RL25 might be better with regard to the tempature variation but never had the chance to try it out.

  5. #5
    Member Float Pilot's Avatar
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    My loads are 73.5 grains of IMR 7828 , a Fed 215M primer and a 200 grain Sierra loaded to 3.340 col.

    I am use to using IMR 4350 for all my magnum stuff, it will be interesting to see how this works out.
    Floatplane,Tailwheel and Firearms Instructor- Dragonfly Aero
    Experimental Hand-Loader, NRA Life Member
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  6. #6

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    82g of IMR7828 Fed 215M primer with 180 Nos Part. Has been a killer combination for my 300 Win Mag. Not recomended for timid. I had to creap my way up to the 82g. I found the groups got tighter the more powder i gave it. I stopped because i was getting ejector marks at 82.5g. It avg 3150 fps , 100 more fps than the manual max at 77g. I also found that thier max velocities graphed well below what was listed. Also keep in mind that these are fired out of a long throated Rem 700. The COL on them is 3.365. Hope this helps you out

  7. #7
    Member RMiller's Avatar
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    Default

    I have used IMR 7828 in the 300 win mag also.

    200 TSX---72 grains IMR 7828 is a full case = 2790 FPS

    180 XBT---77 grains full case imr 7828 = 3130 fps

    180 XBT---78 grains compressed load 7828 = 3163, 3173

    At the time I also loaded retumbo, imr 4350, and H4831

    Max loads of h4831 or retumbo would beat out the 7828 with the 200TSX by another 100 fps.

    I could match the 180 XBT with 72 grains imr 4350 at 3166,3177

    I also shot the 220 sierra matchking IMR 7828 72 grains at 2833 fps

    When I find a load I look for the fastest velocity and the least amount of powder; for power with the least recoil.
    "You have given out too much reputation in the last 24 hours, try again later".

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