The question is - is it a viable caliber is a short barrel gun, e.g., the SA SD Subcompact? Does the loss in velocity rendered by the shorter barrel make the .45GAP less than desireable? There lies the question. Seems like the impetus behind the GAP was to a large extent, ergonomics - SA and others can maintain thier current grip configuration - in the case of SA very popular particularly for those with small hands. But does it really make sense from a ballistics standpoint? Are there any published balistics stats comparing performance out of different length barrels?