Breaching tool

There's a police breaching tool called a KBT (Kinetic Breaching Tool). It uses a blank cartridge to initiate a flat piece of metal out of the end. The metal plate shoots out a few inches then immediately retracts and resets for another strike. The metal plate is blunt and about 1/2 inch wide and 4-5 inches tall. I got the chance to use it on wooden door and metal doors. Pretty impressive.

Anyway, I share all this to ask about reloading blanks. I've never thought about it. This tool uses 45 long colt blanks and the more we have the more we can train with it (if we have doors available). So is reloading blanks a worthwhile endeavor?