Technically still a 22lr

Geno C.

Dirty Carnie
Full Member
Minuteman
  • Oct 24, 2007
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    Wautoma, WI
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    Been pushing my 50gr 22lr copper solid and David Kiff contacted me about it. Suggested some reamer lead designs and possibly running RCC brass with his action. Reamers and brass showed up today. Pieces are coming together. Now that they’re in my hands, I’m really curious how hard they can be pushed.
     
    Very nice, couple of questions for you about it.

    What primers do that brass use ?
    And I presume a firing pin mod/change to suit the primers ?
     
    Thanks Geno C.

    I checked RCC for info, Copy & paste from them below.

    " 22 Long Rifle Center Fire

    We’ve had a lot of questions about this cartridge we manufactured for Dan Hilliard. The .22 Long Rifle Center Fire is a .22 Long Rifle Rimfire that has been modified to a center fire cartridge. The external dimensions are the same as the SAAMI external dimensions and the internal dimensions at the mouth are the same too. We did modify the webbing to allow for a small rifle primer.

    The firing pin on a .22 long rifle rimfire firearm will need to be modified to center fire. Since this was originally designed as a black powder cartridge it has a healed bullet. We do not recommend projectiles or load development, or how to modify firearms, as we are not in that business. We will report on bullet weights, velocity, and energy of a load if it is sent to us. "

    More time I spend on here means I really need a bigger safe or another bigger safe.
     
    Simple enough to figure...

    7000 grains per 1 lb. So, yeah, a 1 lb. jug if it takes 4 grains (on the heavy end) of powder would load 1,750 rounds of .22LR. So, an 8 lbs. jug would net you enough powder to reload 14,000 rounds. 👍🏼
    I was thinking more like 2-2.5 grains. I was figuring the SRP is hot relative to the rimfire priming compound.

    I have a magic 1lb container of unique that never seems to get any lighter.
     
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    View attachment 7760280View attachment 7760282Been pushing my 50gr 22lr copper solid and David Kiff contacted me about it. Suggested some reamer lead designs and possibly running RCC brass with his action. Reamers and brass showed up today. Pieces are coming together. Now that they’re in my hands, I’m really curious how hard they can be pushed.
    Geno are you still coming down this winter? I'd love to see these up close....hope to see you down here one of these days it's beautiful right now.
     
    Seems like it wouldn't be that hard to do a new bolt head for the RimX action that would work, but I don't know what pressures the RimX action is designed for, and I'm not sure how much higher the centerfire 22 pressures would be . . . .
     
    Being straight walled, so long as you don't routinely exceed 60-65ksi, and you have a decent cartridge-case fit, you'll probably get a lot of loadings out of it.

    Somebody could probably draw&head those for much cheaper.