Shot everything from 210 to 250 in the 338 win mag in alaska.
Have never ever recovered a bullet that I"m aware of. One hit a 4 inch alder, a B/C blackie, and through a similar alder after the exit never to be found.
Have worked from very close up to just a bit over 800 yards on a caribou so far.
My buddy uses it as his backup gun when guiding for Brownies and still hasn't caught a bullet that I"m aware of.
Though the tests are probably over since he now has a 416 Ruger...
Re bullets weighint more when recovered... they can if the tissue and dirt isn't totally off them....