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37MM .45 ACP High Performance Screw Apart Shell


The newest 37 MM powered by a .45 ACP casing.

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This brand new, unused 37 MM shell utilizes a .45 ACP blank cartridge for propulsion. This shell is designed to be used with smokeless powder. For easy maintenance, the base on this shell screws apart via a pin wrench. All our shells are designed for best possible results.

Shipping may be delayed while product is anodized.

This shell uses our .45 ACP Burst Disks.

Please check the Inside Diameter, Depth and Length measurements to be certain that wads and projectiles will fit in your shell casing.

Download Loading Instructions (PDF)

Shell Specs

  • Shell Length: 5.75″
  • Inside Diameter: 1.390″
  • Inside Depth: 4.625″

Load Data

Burst Disks: 0.470″ diameter, 0.016″ thick Copper

Primer: Remington 2½ Large Pistol Primer

Powder Grain weight of Charge Results
452AA 5 grains Very good load power
473AA 5 grains Very good load power
Herco 8 grains Very good load power, best
PB 3 grains Good load
4 grains Very Good load power
5 grains Very good load power
6 grains Too powerful, Do not use.
Bullseye 3 grains Good load
4 grains Good load
5 grains Very good load power
Unique 3 grains Good load
4 grains Good load
5 grains Very good load power
6 grains Too powerful, do not use

The best option for wads is the .016 Copper. One casing was loaded 15 times with the 8 grain loads and a solid carrier for weight and resistance, and the casing and vent plug performed perfectly (THIS IS NOT RECOMMENDED AND IS DANGEROUS). Each loading had very nice recoil, no primer push, and no signs of too much stress.

Each load in the table above was loaded 5 times, in the same casing, to check for power, and to make sure the loads were safe, and could be duplicated without casings wearing out, or the loads causing stress that might cause a casing to fail. These are simply guidelines and anyone attempting to load their casings must understand injury and/or death can be a result of loading your own shell. Pace Launcher Casings LLC. cannot be held responsible for injury caused using our loading guidelines as they are simply “guidelines” and cannot be guaranteed to work.

This information is courtesy of George L. Confer. For a unbiased review of our products by the “launcher king” please visit

Legal Disclaimer– By purchasing this item you agree and fully understand our legal agreement/terms and conditions. Also, injury can occur using this item. Please see our terms and conditions page for further information.

Additional information

Weight 1 oz
Dimensions 5 × 1 × 1 in
37mm Tube Length

5 3/4 Inch, 5 Inch


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