Larry, you asked on another thread about the handling of a SKB 100, as I recall. Best I have is as follows:

Ithaca SKB 280E, 20 bore/gauge, 25" barrels, 14 3/8" LOP, 6# even, 4" CG to trigger, uncounted swing effort at 1.02, mounted swing effort at 5.39, and half weight radius (compactness) at 8.88" (very compact). Does that help or do you need a different gun?