Well, I have the pictures I xeroxed from #78, #80, and #81, with the written descriptions of #78 and #80. #78 and #81 had similar carving at the wrist and the skirt of the rear ramrod pipe, so I took the photocopies of #81 (which showed the carving better than the copies I made of #78) and included them with the photos of #78. These all came from "Rifles Of Colonial America", by the way.
Completely lost yet?
Anyway, #78, which Shumway dates at approximately 1772 to 1776 (Haines began work as a gunsmith in '72, and by '76 the gunsmiths of Pennsylvania were being pressured to build muskets rather than rifles), has a swamped octagonal barrel, 44 1/16" long and .56 caliber, smoothbored, 1 1/16" at the breech. The lockplate (a percussion conversion) is 5 5/16" long and of Germanic styling. The brass buttplate is 5" long and 2 3/32" wide, and is of the style sold as a "Haines" or "Bivins" pattern these days.
#80, which Shumway dates in the 1780's, has a walnut stock with no carving whatsoever done to it (thus blowing a .57 caliber hole in the statement that "all" correct Pennsylvania rifles are stocked in curly maple and relief carved). The caliber, as my little joke indicates, is .57, smoothbored, and the swamped barrel is 47 5/32" long, with a 1 1/16" breech. The buttplate of this rifle is 4 15/16" by 2", and of a slightly more generic "Lancaster" style that is also to be found on guns of the same time period from York, Reading, and other nearby areas.
The calibers of these rifles -- smoothrifles, to be precisely correct -- don't tell you much. A lot of so-called rifles never were, but were born with smooth bores; however, a lot of others were originally rifled and later reamed smooth as the Indians and big game disappeared from the east and the need for a heavy-caliber rifle went away with them. Grampa's old tackdriver became a smoothbored "pot" gun, and in such cases there is no way of knowing what caliber they were originally.
The hardware of both rifles, as well as that of #81 (and of all but two of the couple dozen or so Pennsylvania and Southern rifles I photocopied from ROCA, "Thoughts On The Kentucky Rifle In Its Golden Age" [Kindig], and "Kentucky Rifles And Pistols, 1750-1850" [Johnston]), is entirely of brass. Iron shows up only on what is very clearly a typical Tennessee Mountain Rifle, and a crudely-made piece that likely dates to the Revolution and appears to have been put together by someone whose woodworking was adequate-to-good and whose ironworking skills were adequate at best. The wax-cast, steel versions of Haines' and other gunsmiths' hardware are intended to cater to modern gunmakers and their customers, rather than to provide a historically correct option to brass. Iron was at best a rare and uncommonly seen material on rifles, and only slightly more often used on muskets, when you're talking about guns contemporary to Haines' work. I dislike making sweeping statements that include the words "all" or "never", but the term "vast majority of the time" is correct in describing how often pre-1800 guns were stocked in brass as opposed to iron.
Hope this is of help to you. Do acquire copies of "Rifles Of Colonial America", both volumes, and if you're borrowing them from a library have access to a good xerox machine arranged when they arrive. You'll find lots worth keeping for later reference and use.