At the time of the Western beaver trade, mountain man era, the big fur companies bought lots of .50s, early in the trade. Later .54 was an average. Jake made lots of .50s Jake and Sam made lots of .54( .53).
On paper there is little to choose from. .54 has a bit more power, .50 shoots a little flatter.
.54 holds velocity down range a little better, but out to a hundred and fifty yards not so one would notice
When modern ml started to be made they were .45s an .58. The .50 BAR was well known and .50s got a cool factor. A .54 even more cool when they were introduced in the modern age.
Is it ‘better’, I had several and loved ‘em.
Today you buy a dozen eggs or donuts. Back in the day we weren’t so much given to ten and tenths
A twelve bore gun is pretty famous. Most of the war between the states was fought with a .58, 24 to the pound.
Side arms, most of the revolvers were .44 or .36…. 48 and 96 to the pound respectively.
.45/.44 and .36 was also a common rifle size.
One, Two,four and eight dozen respectively.
Was a .54, two ball to an ounce, a book keeping tic?
Just for thought, a bess was eleven bore, but shot about a dozen ball to the pound.
The French musket shot twenty ball to a French pound. And a .62 two dozen to a French pound and twenty ball to an English one
Just a further look English money was all dozens, and twentieths.and even American money 1/8 and 1/16 in the form of ‘bits’ based on Spanish pieces of eight was common
Was that so for the popularity of of .54?