But if we started designing/inventing cartridges today there would not be any 243,308,30-06 not any of our traditional stuff anything with 20° shoulder would obsolete

Everything would be 35° shoulder or 40° shoulder and no case rim period
More velocity cause most(some) have body pushed out for higher degree of shoulder AI type cartridges,actually more stable powder burns,and better brass life cause of less brass flow cause of harder shoulder angle to stop brass flow as much....

Now I don't want my old school cartridges to be obsolete but

Just facts of more modern cartridges

Last edited by 3% outdoorsman; 12/23/24 11:35 PM.