Time to revisit casting for the 450- this time with a more typical type bullet and adding powder coating to the mix.
Here's the idea-
Bolt action rifle with 1:16 barrel. Looking at using a mould similar to this:
COWW, gas checked and powder coated, probably the shake and bake method.
Hoping to load this to +/- 2200fps for deer etc.
Obviously no way to know if a certain rifle will like a certain bullet but that caveat aside is this in general a sound concept?