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45 Colt... 300 gr

Discussion in 'Handloading and Reloading' started by JustsayMo, Jul 23, 2007.

  1. JustsayMo

    JustsayMo Participating Member

    Oct 20, 2004
    the Evergreen State
    I've been testing various powders in my Marlin 1894 and Ruger Blackhawk in 45 Colt under a home cast Lee C452-300-RF bullet using published data for 300 grain JACKETED bullets.

    The Speer #13 manual listed two powders I hadn't tried but had on my shelf. Here are the results.

    HS 7 at the starting load gets 1311 fps out of the Marlin. Pretty much what I expected.

    SR 4759 at .3gr BELOW the published starting load produced 1502 fps average! :eek::confused: I wasn't expecting that! Very low Standard Deviation too. Cases & Primers look fine. Extracted easily... Difference in recoil wasn't noticed. :uhoh:

    I've heard the 45 Colt can equal the 44 Mag but I've never managed to get 1500 fps with a 300 grain bullet in my 44 Mag Marlin...

    How far off the reservation did I go? :uhoh::confused:
  2. Stinger

    Stinger Active Member

    Dec 29, 2002
    I haven't used that powder, and I don't have my info in front of me. But with a moderately healthy dose of 2400 I have gotten a smidge over 1000fps with a Hornady XTP 300g out of a Blackhawk 4 5/8" barrel. I've never shot that load out of a rifle, but I would expect it to be 100fps or so less than what you experienced with your Marlin. It certainly would put a stompin' on the business end even if it didn't on your end.
  3. Gunfixr

    Gunfixr New Member

    Jun 24, 2007
    East Coast, USA
    Since you are using jacketed bullet loads for lead bullets, you're going to get higher velocities, as the softer exposed lead resists the rifling less. I haven't tried lead, but have loaded Speers 300 gr. JSP to about 1250 fps out of my Blackhawk.
  4. Walkalong

    Walkalong Moderator

    Nov 20, 2006
    I have shot SR4759 in the .44 Spl. ( to slow for it, but it works OK ) and the .44 Mag. It shot well in the .44 Mag. No reason it would not work for stout loads in the .45 Colt in the right gun.

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