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.45 Super?

Discussion in 'The 1911 Forum' started by Iron Sight, Oct 17, 2007.

  1. Iron Sight

    Iron Sight New Member

    Joined:
    Sep 20, 2007
    Messages:
    6
    What is the difference between a 45 Super and 45 ACP?

    Thanks
  2. delta13soultaker

    delta13soultaker New Member

    Joined:
    Dec 26, 2003
    Messages:
    2,948
    Location:
    Depends on Uncle Sam's whim every 3 yrs.
    *Also check their FAQ page on their home site.... http://www.acecustom45s.com/default.htm


    We are sometimes asked here at Ace Custom 45's Inc.: What is a "45Super"® or in some cases why there is a "45Super"®? While the concept has been written up many times in the past, perhaps it will be helpful to those who are just becoming familiar with the "45Super"® concept or to those who have had some exposure to the "45Super"® concept, to provide some background on the "45Super"® , from its original conception dating back to 1988, to its current status in 2000.

    In 1988, the beginning idea for a "45Super"® originated in Dean Grennells fertile imagination. Dean, longtime managing editor of Gun World Magazine, envisioned the concept of updating and strengthening of the popular Colt M1911A1G model auto through new gunsmithing techniques and the utilization of modern cartridge cases to improve the 45 ACP!

    To do this Grennells went straight to the problem, pinpointing the weakest part of the M1911 system - the cartridge case itself! The standard 45 ACP leaves a significant portion of the case hanging unsupported over the angled feed ramp of the barrel, thereby limiting pressures and velocities to low levels. The unsupported section is forward of the case head and the brass there is thin, this poses no particular problem since the standard 45 ACP is loaded to levels not much greater than black powder loads, and standard brass is amply strong to handle this! However this scenario does present a serious barrier to increased ballistic performance! (There are some who would argue: that there is no need for increased ballistic performance for the 45 ACP, for those who are of that mindset we leave them there!)

    To address the case weakness of the standard .45 ACP Grennell used a modified .451 Detonics magnum case. This case was longer than the 45 ACP, with thicker walls and a heavier web area to withstand higher pressures. These cases trimmed to proper 45 ACP length and then inside neck reamed to accept 45 ACP bullets, provided the basis for the "45Super"®!

    As a matter of note it was never intentional by Grennell nor is it ours, to wring the last foot-second from a 45 ACP pistol, but to provide a performance boost for 45 auto fans without resorting to extensive and expensive modifications! Grennell did this with the shortened .451 Detonics magnum case utilizing principally a standard .45 auto government model with a 22 lb. recoil spring. While he was satisfied with the cartridge concept, the pistol clearly needed some work to refine the concept completely.

    Dean turned the project over to Tom Ferguson, fellow "Gun World" staffer, who brought a sackful of .451 Detonics brass and a Colt .45 Auto to Ace Custom 45's Inc. This lead to a series of upgrading modifications to the Colt .45 Auto that eventually lead to a properly functioning "45Super"® pistol. The original loads were chrongraphed using both 185 and 230 grain bullets and the velocities returned were impressive indeed. (Detonics' magnum cases)
    185 Gr @ up to 1400 FPS
    230 Gr @ up to 1200 FPS
    At this point Bruce Hodgon of Hodgon Powder Company Incorporated was contacted and agreed to run pressure tests for the "45Super"® and thanks to his gracious efforts, pressure tests revealed that the Colt Mod 1911A1 was well within the strength compatibility required by the "45Super"® pressures. Maximum working pressures for the .38 Super (for example) is 35,700 CUP; most of the loads ("45Super"® ) tested by Hodgon were slightly below this level! (By contrast our top "45Super"® loads today, generate about 28,000 CUP! 185 Gr @ 1300 FPS 230 Gr @ 1100 FPS.)

    It had been done: the "45Super"® was now a reality! Ace Custom 45's added to its line of services "45Super"® conversions on customer supplied weapons!

    Eventually the supply of .451 Detonic's Magnum cases dried up and except for laboriously modifying .308 Winchester rifle brass there was no cartridge case suitable for the "45Super"® concept.

    This changed in 1994 when factory produced "45Super"® ammunition became available and Ace Custom45s obtained a "Federally Registered Trademark" of the name "45Super"®. The factory "45Super"® ammunition was based on "new cases" made by Starline Brass to meet the parameters required for "45Super"® pressures and velocities; with the cases being headstamped "45Super"®, and finally Springfield, Inc. introduction of a factory produced "45Super"® PISTOL, their V-16 LONGSLIDE "45Super"® pistol.

    Currently Ace Custom .45's Inc. offers 10 different complete "45Super"® pistols, based on Springfield Armory, Para-ordnance, Kimber, and Glock Model 21 units and of course we continue to offer "45Super"® conversions on customer supplied weapons, as well as "Gunsmith fit" "45Super"® conversion kits, for Govt. Mod 1911 style pistols and 4506 series Smith & Wesson pistols, and the Glock M-21.

    As for the future; Ace Custom .45's Inc. is currently evaluating other candidates for the "45Super"® concept, and will be adding new additions to our current line of complete "45Super"® pistols in the future.

    "Good Shooting"
    President, Ace Custom .45's Inc.

    Garey O. Hindman
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