Silicone Pads that hold 30 cal bullets up while cooking them

If you are going to start casting download a free pdf of From Ingot to Target. Its a older book but it has so much info about casting. its not a boring book and I have read it a couple of times (quite long). Anyway a gas check is a piece of metal on the bottom of the bullet that helps prevent the hot cases from leaking around the bullet and causing leading and loss of accuracy. Everyone ends up with their own guidelines. I like to gas check anything going more than 1700 and anything that may be higher pressure. I use them sometimes when I may not need them but I would rather error on the safe side and I do not like cleaning lead out of a barrel. Look up a Elvis Ammo video where he was casting zinc, he had some real problems and it destroyed his pot.

Here is that video where he had the problem with Zinc. https://www.youtube.com/watch?v=0z3k_gy1Plw