Re: where do most of you get your bullets ?
While swaged bullets are more prone to leading the barrel, cast bullets, in my experience, will do it too, even at pedestrian velocities.
One swipe with the Lewis Lead Removal Tool might work for some but I have not found it to work that well for me. My lead build up seemed always near the breech end and often was clumps of lead rather than long strings of lead down in the rifling. I only shot cast bullets. Nothing short of picking it out with a dental pick would get it out.
The end solution was the copper coated bullets from Rainier. They don't lead. They shoot well. I have only one gun (Colt Lightning clone Taurus Thunderbolt in 45 LC) that requires a Cowboy style profile to feed well and that is only available in cast lead. And yes, it leads the barrel to some degree but I have no choice as the Rainier bullets shape does not feed well. Every other pistol or revolver or rifle (many) shoots either jacketed bullets or the copper flashed Rainier bullets with absolutely no leading or copper buildup.
Sorry but I never believe people who tell me leading is easy to remove as I know better after 20 years of continuous shooting and reloading for 20 some calibers!