A pic is worth alot
Are ya talkin `bout something like this ???
& probably gettin the mold too hot (2 big holes for a 2 banger), how fast do the sprues freeze ??
This is from the mold too hot . & cast from a Lyman 314299DC seconds apart . The bullet with the bad bands are from the cavity I always filled first thus giving the mold time enuff to absorb more heat from the alloy & getting too hot.