Good call Sarge-

It's highly unlikely you'll loose any money in an 8bore rifle of any configuration.
Get one, run it, see how you like the two ounce bullet!
You may well 'get over it' and end up turning whatever rifle you get for a profit...
Or (my guess, more likely) you might end up bitten so hard by the BoreRifle bug that you end up realizing 'all that other crap you own' is better off sold to fund the best 8bore double you can find.

You'll see.

--Tinker