Buffalo Bore Ammunition 45 Auto Rim (Not ACP) 255 Grain Hardcast Flat Nose Box of 20

Product #: 696255 Buffalo Bore Ammunition #: 31A/20 UPC #: 651815632919
$31.99

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Product Information

Buffalo Bore loads their ammunition up to maximum SAAMI specifications, which delivers devastating performance on a wide range of game. Please note that this ammunition is safe to use in older prewar revolvers in proper working condition. This ammunition is new production, non-corrosive, in boxer primed, reloadable brass cases.

Owner of Buffalo Bore Tim Sundles on 45 Auto Rim Ammunition:

You've been asking for a couple heavy 45 AUTO RIM standard pressure loads, so by popular demand, here they are. Both of these loads utilize high quality Starline brass. We've also incorporated flash suppressed powder so you can shoot in the dark without blinding yourself and this is important because over 95% of all civilian shootings in the USA occur in low light when the criminal element is at work. Both of these loads are the ballistic equivalent of +P 45 ACP loads, yet they operate at standard 45 ACP pressures. These loads are safe to use in ANY 45 ACP revolver that is in normal operating condition, including ANY model 1917 Colt or S&W revolver.

Check out the below velocities fired from personal real world revolvers, NOT test barrels. You'll notice that the new S&W 4 inch MT Gun gives velocities almost as fast as the older S&W revolvers with 5.5 inch and 6.5 inch barrels. This is not a typo. It simply shows that the new S&W revolvers are made to much tighter tolerances than the older S&W revolvers and therefore give higher velocities per inch of barrel.

Item # 31A - 255gr. hard cast flat nose bullet
  • S&W Mountain Gun, 4 inch bbl. = 869 FPS
  • S&W Model 325 (scandium) 2.5 inch bbl. = 795 FPS
  • S&W Model 1917 (1937 production) 5.5 inch bbl. = 880 FPS
  • S&W 1955 Target (25-2) 6.5 inch bbl. = 875 FPS


  • Item # 31A was designed for deep penetration with no bullet expansion. It will shoot through stick frame and dry wall construction walls and through both doors on a 2003 Dodge Ram or through a black bears, etc. It was designed for, among other things, outdoor use including black bear protection. Expect around 27 inches of penetration.

    Technical Information
  • Caliber: 45 Auto Rim (Not ACP)
  • Bullet Weight: 255 Grains
  • Bullet Style: Hardcast Flat Nose
  • Case Type: Brass

    Ballistics Information:
  • Muzzle Velocity: 850 fps
  • Muzzle Energy: 409 ft. lbs.
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      Buffalo Bore Ammunition 45 Auto Rim (Not ACP) 255 Grain Hardcast Flat Nose Box of 20
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