Shot it unparkerized for a few months before taking it apart and finishing it. Made a sizer die to size the expanded and cut off 30-06 cases. The main bullets I've been shooting out of it have been .400" 200gr XTP's, barnes 195gr MZ, Hornady 200gr SST, the last two being muzzleloader bullets of the correct dia and designed for the correct speed range of 2300-2600 fps muzzle velocity depending on action and barrel length. This first barrel was for an ar15, and I am limiting the chamber pressure to 55Kpsi even though the bolt/extension is rated to 65Kpsi. Currently I'm turning a bolt action barrel for my buddy and up next a LR308 barrel for me. Since the case has a gentle taper, if you remove the decapping stem and raise the die up it will function as a taper crimp die. I believe I'll be hunting with the Barnes 195gr bullets this year in this upper even though a solid copper bullet is long for it's weight resulting in slower velocity from reduced case volume. When shot into the water at a mild 47,506 PSI load the magnetospeed recorded a speed of 2391 FPS.