Originally Posted by Hollander
After each one has been chambered twice. I mark them with a marker and if they have been chambered twice they move to the "shootem up pile". I am one of those who has a little concern from rechambering shells too many times and potentially uping the pressure.
You can also manually put the rounds into the chamber and then you'll never have to worry about it. That's what I've always done.
For the GF's p22, since ammo is already pretty inexpensive (500 rounds for $50 for what we actually keep loaded in it), we just take the loaded mags to the range and run through them before loading up practice ammo (so, 21 rounds total).
For centerfire, though, I never really bothered shooting more than was necessary to check function, recoil, POI, etc. With the .44, my handloads are the same weight and velocity of my defensive loads and feel / shoot almost identical, so that isn't a huge deal.