SJoe, i agree with John. if it ain't broke... there are a head spinning number of gizmoes and gadgets which will supposedly make your rifle more accurate, more powerful, more this and that and more attractive to the opposite sex.
but it ain't broke. it's not designed to be broke: it's designed to bang a rock into a hunk of steel and then ...
and of all the thousands or tens of thousands of PRB which i have launched, the magic has never even begun to fade. the latest 30 cal kingkongkiller comes and goes, but plain old prb goes on. it served out founding fathers well, and their children, and i have taught it to my children and will (God willing) teach it to my grandchildren, generation upon generation. in an odd way, it is a constant and a comfort in an ever changing world. so: one guy's opinion (and worth what you just paid for it):
don't worry so much about the latest gadget: a lot of the attraction of this game is not being drawn into the latest fad or falling for the latest gizmo, it is instead the sure and certian knowledge that the ball will fall into the black at that whatever range.
spend your time on the practice of your marksmanship and your woodcraft, and you'll put a good bit more venision in your freezer that some fellow with the very latest thingie.
thus endeth the rant.