I dont post much here and contribute even less, mainly because I dont know much, but I figure you folks are probably the best to ask questions to about mould and design elements.
Im going to have to take the plung and try to start casting for at least one firearm I bought because buying cast bullets is about as much as jacketed. I bought a Rossi92 in 454Casull. I bought some bullets from Matte Bullets and they shot great but due to the fact of buying for so many other guns Id like to cast my own for this one, to start, and eventually take more of the load off of my wallet (maybe).
Accurate Moulds is where Ive been looking due to the wide array of choices he has. He has so may though it is starting to hurt my brain.
When looking at designs, particularly the grease grooves, do you want to have two or more small grooves or fewer or one larger ones?
Being that Ill be loading for a long gun I want a gascheck, if I find a design I like can I get a GC added? If I used a somewhat harder alloy would I necessarily need one?
How do some of the harder alloys react when cooling? Do they contract? To what degree?