Rammed up two and poured. I charged with the worst lost foam failure and some miscellaneous pig and my usual oyster shell and a touch of the Desulco. I pushed the temp close to 2600 and when I poured there was no volatile off gassing from the core which is one of the advantages of NaSi cores. The chill wedge shows white iron up to about .070" and where I touched it with with the file it was nice and soft. This shot of the drag shows the screen cloth I put in the sprue to catch any slag the might get drawn in. If I chocked the sprue properly any slag will rise in the cup.