Chamber Cast - is mentioned often, but was a major PITA when I did one - so, I had got a pound bar of Cerrosafe from Brownells - made up like a "double boiler" - the Cerrosafe alloy goes liquid before the water boils - VERY low melting temp. The container with the Cerrosafe in it was on wire forms so it had water underneath that container - I did not want direct heat from the element to get to that can. And I had pre-warmed the metal barrel - played a propane torch on it to get it warm enough that I could feel that heat if I held that barrel - I missed the part about getting the chamber and throat UBER CLEAN - I think I created a mechanical lock in there - idea is that the Cerrosafe will shrink slightly when it first hardens - then swells to size of mould in about an hour - that is when you take measurements - a day or two later the thing has swollen some larger than "as cast". Multiple bent cleaning rods trying to push that casting out - I ended up to re-heat and melt that all out from the barrel - THEN cleaned it good and the casting seemed to go fine. Shove a normal cleaning patch into throat area - that will stop the Cerrosafe from flowing into the rifling - that may have been part of my difficulty. I re-use the Cerrosafe over and over again - at least what did not dribble or splash onto the floor.
