It would be fun to proportionally handicap "stoppers" above and below 5000 pnds energy--The math could be simple and shooting a bigger bore stopper could be scored to your advantage.

Some examples(briefly pardon me my flight of ideas to score big bore training as this interests me)i.e.--

A 5000 ft pound gun(standard weight) x 2 seconds=10,000 score

A 6000 pnd energy rifle(standard weight)-6000/5000=1.2x energy so handicap inversely to its advantage---5000/6000 x 5000 x 2= 8330!!

If you were shooting a 4000 pnd rifle(standard weight)below 5000 pounds energy you could even handicap adversely--

5000/4000 x 5000 x 2 seconds=12,500

The bigger the bore with accuracy and speed wins with the lowest score!!!!

Laugh your butt off at me but this could be fun!! All this is semi-BS but shows how fun it could be practicing big bores with little mental effort,shooting skill, and a stopwatch!!