Brent, couple questions/comments not related to the possible bend in the barrels:
1. Are you sure your first SKB 20ga has 24" barrels? If so, they've been cut. The Ithaca SKB 20's choked IC/M came with 25" barrels.
2. If the stock is too low, the problem isn't that you'd be looking down on the barrels. Rather, it'd be the opposite (unless you raise your head and don't cheek the stock): You wouldn't be able to see the barrels. If your cheek is firmly on the stock and you're seeing too much barrel, it's because the stock is too high. Not enough drop. On quite a few older American doubles, the stocks have so much drop that you won't see any barrel at all unless you shoot with your head up/off the stock.
