Hello All,
I am very new to casting, as in I am still researching what equipment I want to start out with. The first question that I am needing help with is this:
I have a 300 AAC Blk rifle that I am wanting to cast 200+ Gr subsonic loads for. The SAAMI spec is that this is a .308 boolit. However, I notice a lot of people buying .311 molds for casting their boolits. Can anyone tell me why they are buying molds 3 thousandths larger than the bore is supposed to be?