Hi All,
I am new to the form and to casting and I think I may have stepped in it. I have a Buffalo Arms mold and to preheat the mold I use a blow torch. I try to heat it up evenly around the outside and the inside, I have used it twice. The first time when the mold is closed I could not see any light through the halves. After the second use I can see a thin line of light in the nose of the cavity when the mold is closed and the sprue plate is open while I hold it up to the light. On some of the boolits there is a very fine line on the side of the boolit, not where the light is showing. I looked at the inside of the mold and it is clean along with the guide pins. Finally, my question is: did I warp the mold by heating it in this fashion? Will this line on the side affect the boolits flight? Any suggestions/opinions are appreciated. Thanks.