Are you sure it's leaded up? I saw a thread on the Kel-tech Owner's Group forum describing rough barrels and Kel-tech's response was that the since the barrels were extruded some of them look somewhat rough.I put about 200 through mine, #6 and buck shot and it is EXTREMELY leaded up.
Tornado brush you say. I forgot to mention that I put probably 10 slugs through it too. All the major spots are removed thanks to some fine steel whool but it's still not super clean.




























