[legion]

I just used it on 100 rounds of .223. Probably took around an hour to check and correct all of the rounds.

Considering that it took me about 4 hours to trim, chamber, deburr the inside of the case mouth, deburr the flash hole, and clean with my ultrasonic cleaner the same 100 rounds, then another hour to lube and reload them (progressive press), another hour to check the concentricity wasn't so bad.

If you have a problem with rounds jamming, this wouldn't be a bad thing to check. Most likely, you should just replace your bullet-seating die.

I'll probably only bother with this in the future with match-grade ammo.