I would have to say brass prep has got to be the absolute worste part of reloading. I just finished 125 rounds of .454 Casull and over 400 rounds of .223. Tumble, resize, trim, primer pockets,the whole nine yards. And that's before I actually reload it . I almost hate to shoot it the brass looks soooo purty when I'm done. Notice I said "almost". Unfortunately my Bushmaster Varminter will make short work of all that ammo.