Sounds like you're shooting the standard 25yd National Match course of fire. Using iron sights is fine if you're starting out. If you want to jump in with red-dots then I'd suggest using the original Ultra-dot on your springfield(if you still have the mount). You can get by with a much less expensive Red-dot on the Buckmark. An inexpensive Red-dot won't hold up very long on the .45.
With the .45ACP a 185gr or 200gr LSWC running at about 750-800fps is what you want, and will be alot more manageable than ball ammo.
For the .22, give CCI standard velocity a try.
Welcome back to a great game.