its not the brass--I use '06. What I meant was: had the rifle been rechambered for 30-06, the enormous throat would have been replaced--I assume--making it easier to cast for.
But you hit on one thing, I might have to invest in a better mold.
still, that 75 yard test gives me hope. I need some time to make more boolits to see if it holds up.
thanks for the feedback, btw.