Last night I had a dream where I was at the range (many of my dreams start at the range). A friend asked me if a 9mm Luger load with a heavier bullet would shoot more accuracy. I turned around, unziped my range bag and took out pre-primed cases, bullets of the correct weight and a box of compressed powder pellets. I put the powder pellet into the case, screwed in the bullet and then handed the loaded cartridge to my friend.

The concept my unconscious brain come up hinges on having a polymer case with internal screw threads that will break off when the round is fired. The hard copper threads of the bullet should cleanly strip the polymer case threads.

Triple Se7en muzzle loader pellets.

Extreme Polymer Research’s Polymer Handgun Cartridge Case (Middle)

I like the idea of being able to create a custom load on demand is nifty, but this idea is fraught with numerous problems. The bullet seat depth could not be controlled, the cases would need to be pre-primed, compressed powder does not burn as well as uncompressed powder (and powders would need to be developed), bullets would be more expensive and accuracy would not be as good as a conventional loaded round. Don’t expect Steve’s Special Supreme Modular Polymer Rounds to appear on the shelf of your local ammo retailer anytime soon.