IMHO side flushers (hepburns) are the finest single shot ever designed and for years they were one of the cheapest to buy; those days are long gone, but you can still find wonderful deals on them when compared to same condition 1885s.
I am not includeing RBs or 74 Sharps in that statement because in my mind they are "early" designs and in a class all thier own.
Del, many years ago I tried loading a 45-70 case with the scrapings from wooden matches and I used a regular primer to fire it in a navy arms RB locked in a vise with a string tied around the trigger and me about 40 feet behind it squatting close to the ground pulling the string. The dang thing worked but talk about a mess to clean.
I still think we need a place here or on TFS to talk about single shots