I'm not going to make this into a big debate but there are two things I have to mention. I do not recommend heavy lapping of the barrel with valve grinding compound etc. I do believe that JB bore paste used properly will polish the barrels (especially the stainless ones which as you know stainless tends to machine rougher than 4140 or other carbon steel). If the new barrels are so good why do the bench rest guys use JB Bore Paste. Obviously you have not experienced a really tight barrel. My Omega when received broke two ramrods (one supposedly unbreakable) trying to load Hornady sabot/bullet combinations. I had to remove the breechplug and drive the load out the front with a hammer and a brass rod. I don't weigh enough to push that down the barrel. After about 50 shots with Powerbelts and 100 stokes of JB Bore Paste I can now load some sabots as long as I use a solid very strong ramrod.