"Modern dimensions" usually denotes something like 1.5 DAC x 2.5 DAH. Witness the new RBL's advertised at 1.5 x 2 3/8. They're supposed to fit Joe Average.
Pre-WWII it was more common to see 1 5/8-1 3/4 DAC x 2 3/4 -3 DAH for off-the-rack guns intended for Joe Average. But it's not uncommon to see target guns and live pigeon guns of the day with higher dims.
Although I've encountered a number of pre-war British guns with large amounts of drop, it does seem that the odds are much better with the Brit guns of that era for finding a gun with more "modern" dimensions. Is that the case or just poor statistics? If it is true, I wonder why? Driven shooting versus the all round gun?
