EWK in Richmond Ohio makes a barrel wrench far superior to most of the factory model for $23, they can be found on Gun Broker, I just checked. The factory barrel/cylinder gap is 0.006 and an automotive feeler gauge works fine.
Some guys set the gap as low as 0.003 to get all the velocity from...
Mt two favorite Encore barrels are my 24 " blue 243, my last range session I was shooting 3 shot groups, 85 gr Federal BTSP at 100m that you could cover with a quarter. The other is a 26" SS 204 Ruger, on a good day I can shoot 5 shot groups, Federal 39 gr blitzking that you could cover with a...