Coated 240gr TC and IMR4227
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Thread: Coated 240gr TC and IMR4227



  1. #1
    Tinhorn
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    Coated 240gr TC and IMR4227

    Good morning everyone, I’m getting ready to start reloading the T4 today and am curious about opinions. I’m trying to use what powder I have on hand at the moment. I think I’ve settled on using imr4227 but the 444 reloading data on the forum shows a starting load range from 32.5grs to 39grs.

    Both are used with jacketed boolits and I have 240gr TC coated boolits from Penn Bullets. The owner tells me he’s had guys run his alloy with the coating up to 2700-2800 FPS with success. The 32.5-39.0 grains show that their particular starting loads will be floating around 2000 FPS.

    Have any of you tried imr4227 with cast and had good results? I also have leftover benchmark I used for a short run of 45-70 loads if that’d be better.
    Are you going to do something or just stand there and bleed?

    Team 444 #795, Team 1894 #610

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    Super Moderator
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    I don't shoot 240 gr bullets or boolits in my 444s. With heavier hard cast--IMR-4198 and RL-7 always worked best for me and for many others on MO. I would grab the Lymans cast bullet manual and take a look. Unfortunately mine is at the house and I am at work. I would be very careful with using IMR-4227 since its a magnum pistol powder. Not that it can't be done---but I wouldn't use it until finding some real world published loads for the Triple-4.
    Last edited by Ret_Eng; 05-22-2020 at 08:22 AM.
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  3. #3
    Gun Wizard
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    RCBS cast bullet manual lists 27-29 grains of 4227 pushing a 245gr swc 1688-1808 fps in 24" barrel

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  5. #4
    Wrangler
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    I don't think a 444 marlin can push a 240 grain bullet 2700 to 2800 fps. Those kind of velocities are what you typically see from a 243, 270, 30 06 etc. I reload for my 444, and I like to push speed, but 27 to 28 hundred fps, I couldn't even come anywhere close to that. I value my Marlin, and would not want to destroy it on someone telling me that he has guy's pushing those velocities. To me that would be nothing more than a sales pitch. On a final note you stated IMR 4227 which is a handgun powder, but you are indicating data for a 444. Hodgdon shows 22 grains as being a compressed load in a 44 mag using IMR 4227. Whether it is a 44 mag or 444 marlin, those velocities are improbable. But whatever you do, good luck, but most importantly, be careful and stay safe.
    ranchhand likes this.

  6. #5
    Gun Wizard
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    IMG_2094.jpegIMG_2092.jpeg
    here's the rcbs book page
    I think double clicking on em will blow them up

  7. #6
    Tinhorn
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    Quote Originally Posted by mam444 View Post
    I don't think a 444 marlin can push a 240 grain bullet 2700 to 2800 fps. Those kind of velocities are what you typically see from a 243, 270, 30 06 etc. I reload for my 444, and I like to push speed, but 27 to 28 hundred fps, I couldn't even come anywhere close to that. I value my Marlin, and would not want to destroy it on someone telling me that he has guy's pushing those velocities. To me that would be nothing more than a sales pitch. On a final note you stated IMR 4227 which is a handgun powder, but you are indicating data for a 444. Hodgdon shows 22 grains as being a compressed load in a 44 mag using IMR 4227. Whether it is a 44 mag or 444 marlin, those velocities are improbable. But whatever you do, good luck, but most importantly, be careful and stay safe.
    When the gentleman told me about his Bullets doing 27-2800 FPS it wasn’t in reference to the T4. He was simply letting me know that the coating would handle 2000-2200 for my rifle.

    Thank you for the advice on 4227. I figure asking first would be better before ruining my first 444m.
    Are you going to do something or just stand there and bleed?

    Team 444 #795, Team 1894 #610

  8. #7
    Tinhorn
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    Quote Originally Posted by Goldtrigger View Post
    IMG_2094.jpegIMG_2092.jpeg
    here's the rcbs book page
    I think double clicking on em will blow them up
    Thank you very much. That makes me feel better about testing my loads.
    Are you going to do something or just stand there and bleed?

    Team 444 #795, Team 1894 #610

  9. #8
    Tinhorn
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    Well I was able to load up my very first 444m ammo today. Penn Bullets 240gr TC coated over 52.3grs of benchmark. I’m going to load a few with IMR4227 before hitting the range Sunday.
    Are you going to do something or just stand there and bleed?

    Team 444 #795, Team 1894 #610

  10. #9
    Tinhorn
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    I have an old, (October 1990) "IMR Handloaders Guide For Smokeless Powders." It states that 32.5 grains behind a 240 Remington Cor-Lokt is a maximum charge at a velocity of 2030 FPS from a 25 inch barrel. The Chamber press. is listed at 44,000 CUP. I am not familiar with the coated bullet and whether it could be pushed at the same velocity or not. The pics that "Goldtrigger" posted should for sure get you started. The jacketed Cor-Lokt bullet has a diameter of .430. Since I don't know what your actual diameter is ( jacketed, coated or not) I would approach these close to maximum loads with extreme care. However from the information on this post you should be able to utilize your IMR 4227. I have used IMR 4227 in 6.5X55 Swedish for some reduced loads. It had low recoil and a very mild report, however I kept an eye on the primers and noticed that every third or fourth reload had what i would call " a primer that had experienced a higher pressure". Keep an eye on those primers and let us know the results. Good luck.

  11. #10
    Tinhorn
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    Quote Originally Posted by burzynsr View Post
    I have an old, (October 1990) "IMR Handloaders Guide For Smokeless Powders." It states that 32.5 grains behind a 240 Remington Cor-Lokt is a maximum charge at a velocity of 2030 FPS from a 25 inch barrel. The Chamber press. is listed at 44,000 CUP. I am not familiar with the coated bullet and whether it could be pushed at the same velocity or not. The pics that "Goldtrigger" posted should for sure get you started. The jacketed Cor-Lokt bullet has a diameter of .430. Since I don't know what your actual diameter is ( jacketed, coated or not) I would approach these close to maximum loads with extreme care. However from the information on this post you should be able to utilize your IMR 4227. I have used IMR 4227 in 6.5X55 Swedish for some reduced loads. It had low recoil and a very mild report, however I kept an eye on the primers and noticed that every third or fourth reload had what i would call " a primer that had experienced a higher pressure". Keep an eye on those primers and let us know the results. Good luck.
    Will do and thank you for the info as well. I intend on sticking with the window Goldtrigger gave me.
    burzynsr likes this.
    Are you going to do something or just stand there and bleed?

    Team 444 #795, Team 1894 #610


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