I have a sxs 12 bore, 2 1/2 chambered (smoothxrifled) paradox cape gun. The right barrel shoots H&H paradox rounds very well out to 40 yards (was shooting it today) and the left barrel is tightly choked. I have a few questions:

Right barrel - can I shoot shot out of this barrel. Will the plastic wads crud up the rifling or is that simply not a worry?

Next, I have the mould for the 730 grain slug that fires well out of this barrel. I also know the powder charge but I don't know what equipment I need to load these in the 2 1/2 shells. is it just fiber wads under the slug and how do you crimp the top. I've loaded shot shell for 12 gauge before but I'm hoping to get some hand loading gear to load this new paradox rounds.

Lastly, I need help with loads for the left barrel. Shot loads, no problem. I understand that the left barrel can/should be loaded with ball shot. I can size the bore, what is the proper dia ball size for the bore, under .001? again, what is the manner of loading these?

Any references you could recommend? Thanks for your help.