I am going to try to shoot some this weekend.

Just an idea to level the playing field. Multiply the group size by the barrel length.
A 2" group with a 1 7/8" barrel (2*1.875=3.75)
should beat
a 2" group with a 3" barrel (2*3=6).

Maybe even a caliber multiplier... 44 beats 38 beats 32 beats 22...
Just a thought.....