That rifle will handle any 30-30 load made today. The 30-30 is a low pressure cartridge with low recoil.

For whitetail deer it will cleanly kill them to about 200 yards with no problems.

As far as sights goes you are pretty much limited to open sights due to the fact that the older 94's were not angle eject. They eject straight up out of the receiver. I would suggest a tang mounted peep sight if you really want to change it up. Personally I would not go messing with it since it is a pre 64' model 94. I would leave it the way it originally was built. Unless, of course, it has already been messed with.