OK, guys, here is some data.
Greener Imperial SLE #69917 16 ga 29" bbls LOP 14 5/8 - weight = 6# 4 1/2 oz, bal to trigger = 4 5/8", MOI at balance= 1.42, MOI at butt = 6.43, HWR = 10.25
With 5 oz Bugden forearm guard 6# 9 oz, 5 1/8", 1.51, 7.04, 10.32
4 1/2 oz weight gain enoung for most shooters to notice), balance moves 1/2" forward (most shooters will notice 1/4"), MOI at balance increase by 0.09 (about 1/2 enough for most shooters to notice), MOI at butt increase by 0.61 (noticible to most), and HWR increase by 0.07. The forearm guard is close to the balance point and, at that location, has small effect on MOI numbers.
Questions?
