pantannojack
US Veteran
My 18-3 gave me extract problems. I inspected with a Lyman bore cam to see tiny burrs from manufacture. I twisted a brush with patch & valve lapping compound half way into the chambers. Do not go deeper than the length of a fired cartridge case. The hole narrows for the bullet alignment and pressure seal. I have no issues since then using Federal Auto Match ammo. If one must tap the extractor rod, be very careful to press straight down not to bend said rod. With the double action revolvers we must push out all six at once vs one at a time with the single actions.