I personally don't like shooting with my neck all crunched over.

But, the pigeon guns even in the old days were shot from a mounted gun position, weren't they? So I would have expected them to have less drop then as now.

I just think too much emphasis is placed on 'gun fit' to the point that we have experience shooters who feel they can't function unless the gun is perfect for them. I think a truly good shooter can hit with just about anything given a few warmup shots.