I would do lots of reading on the cast book it forum.
I gave up on .22's in cast long ago.
It's exponentially harder to do well than with .30 cal.
I've recently started playing with .25's but the results haven't given me the warm, fuzzy feelings.
When I was stalking the wily gopher, back in the seventies, I could easily get 1 inch groups at fifty yards, but the same loads would be five or six inches at 100 . This was with .22 Hornet and .222.
Beagle, an American guru, with vast experiences, states that the secret to good 100 yard .22 groups, is to go to a hollow point design.
I tried one, but wasn't impressed. It is much harder to get good, small bullets.
Powder coating has opened new doors, so many new things are possible.
Bottom line is that I'd do lots more reading before dropping a couple of hundred of our tuckered out dollars on a quality mould.