[tanknetter]

Almost all Confederates were armed with muskets, the Union mostly breech loaders and a significant number or companies had repeating rifles.

That doesn't strike me as true. Breech loaders and repeaters were mainly carbines used by the Federal cavalry from about the middle of the war on. I don't think they made it into use, or at least widespread use, in the infantry.

They certainly had an impact, tho, even in their limited use. The 7-round carbines used by Buford's cavalry are credited with him being able to hold the ground along the Western edge of Gettysburg (McPherson's Ridge, etc) until Reynolds infantry arrived on the first day. Between that and Ewell's decision that taking Cemetery Hill was "impracticable" were the first elements of a cascading series of events leading to Lee's defeat there.

[donmeaker]

I am sure a small number of Hall breech loaders were still in service, but you are right, most infantry weapons were muzzle loaders.

http://www.floridareenactorsonline.com/revolvers.htm

a nice site that discusses revolver manufacture.