with regard to drop...

it has been my experience over the past 40 years or so as a hobby dealer in antique and collector firearms, the following has been observed about sxs shooters...

most dont concern themselves with drop...some hunters make a big deal about drop at comb...target shooters are more concerned about drop at heel...

sxs guns stocked 1 1/2 x 2 1/2 x 14 1/2 are the most popular...

o/u, autoloader and pump gun shooters are mostly happy with factory dimensions...

in the right hands, a browning superposed, remington 1100 and win model 12 are magic, right out of the box...

keep it simple and keep it safe...