As far as skills development. I find that well aimed shots on small targets with a pellet gun or a 22 rimfire do me as much good as center fire rounds do. I like to warm up with my rimfire and then shoot 5 to 20 shots with my hunting gun. I also recommend dry firing with your hunting gun concentrating on sight alignment, trigger squeeze and follow through. Frequent small sessions will help you more than the occasional marathon.
"Therefore go and make disciples of all nations,... "
Handgun hunter since 1979 - haven't used a rifle since!
HHI member #992, NRA, SCI.