Eliminates sharp edges in case necks that can damage bullets. Its 22° reamer smooths case mouths so bullets slide easily into the case. Recommended for Sierra and Berger VLD bullets.
I have a lot of new pistol brass and it rarely comes chamfered. I'm the cheap sort who tries to use hand tools whenever possible. This Lyman reamer has the best handle of any I've tried. It makes a tedious job much easier.