Saves me a lot of time, I have 223 and 308, prepping 200-300 pieces of brass at a time the savings really add up. I use them on the RCBS power trimmer. The two sizes cover >80% of my reloading activity. I also use the RCBS case prep station, but cleaning up after conventional trimming on a 277 or 458 case takes significant time even then.

Regards,
Brian in CA