A little bit of tin, and a little more heat in the mold along with some good sooting and I bet you have picture perfect more stable sizing projectiles. I'm happy to see a fellow boolet pourer.
I dont even currently have a air rifle to cast for yet but I am trying to gain knowledge on the topic. I currently cast for several firearms. I am curious as to why you would gas check for a air rifle Thank you
Sometimes a gas check mold is used for airguns, but usually with the actual gas check not installed. The rear recess can act like a bit of a boat tail on the slug which can help stabilize it. I'm guessing 6gun's picture is just an example of a good cast with good fill-out of the grooves, smooth surfaces, and sharp corners. I'll bet those bullets are for a large bore powder burner, maybe a black powder rifle. 6gun can probably give you better information than this relatively newbie caster!
They're not for an air rifle
I don't own a caliber I can feasibly cast for in air That's 180 grain to mimic Buffalo bores bear ammo and 405 for max pressure single shot 45 70 before the lubing.Nailed it! High pressure smokeless and not tumble lubed on one or run thru the lubrisizer yet. It was just to show what took me a few years to figure out how to do perfect and easily.
