Part of "what is proper" is what a shooter is accustomed to shooting.
In my case, I grew up shooting a circa 1900 Parker 20 gauge, so the only doubles I own are Parkers and Parker repros with splinter fore and straight grip aft. Just in a rut, I reckon.



NRA Patron, TSRA, Whittington Center, DWWC,DRSS
Reloading Ballistics App at http://www.xplat.net/