Due to limited supplies of brass, Buffalo Bore (Buffalo Bore Ammunition Review) has begun loading +P and +P+ ammunition in brass that may not indicated as such on the headstamp. Example: 9mm Luger +P+ ammunition may designated as 9mm Luger +P or simply 9mm Luger on the headstamp.
IMPORTANT INFORMATION ABOUT THE HEADSTAMP ON THIS BRASS:
Buffalo Bore loads their ammunition with the highest quality components available to maximize the performance of the ammunition. This ammunition safe to use in all 40 S&W chambered firearms with a fully supported chamber. Most Glock 40 S&W do not have a fully supported chamber do not use this ammunition in Glock 40 S&W or other unsupported chamber pistols. This ammunition new production, non-corrosive, in boxer primed, reloadable brass cases.
Owner of Buffalo Bore Tim Sundles on Buffalo Bore Heavy 40 S&W +P
40 S&W WARNING
“This data intended for use in firearms which fully support the cartridge in the chamber. Use of this data in firearms which do not fully support the cartridge may result in bulged cases, ruptured cases, case head separation, or other conditions which may result in damage to the firearm and/or result in injury or death of the shooter or bystanders.”
Glock happens to chamber their 40 S&W pistols without a fully supported chamber and both of those above safety notices are likely aimed at Glock. I know of no other 40 S&W handguns being sold in the US that don’t have fully supported chambers.
Check out the velocities below that I shot with these loads in several modern pistols that I own.
Item 23A/20: 155gr. Jacketed Hollow Point
- a. Custom made 1911 with Nowlin (5inch barrel) = 1318 fps
- b. Taurus PT 100 (4.9 inch barrel) = 1249 fps
WARNING: 
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