Eric (post #8) was thinking the same thing I was.
This is "the Square-Breech Rifle":
I think the term, "poor boy," is probably a phrase coined by modern collectors (like "plains rifle"), but if this one doesn't qualify, I don't know what would. The accepted date of its construction is in the 1760-1770 range. It is believed to be American-made in one of the southern colonies out of recycled foreign parts; English lock, French triggerguard, and Dutch barrel. It is reportedly .66 caliber, rifled with eight grooves. The barrel is said to be 39.5" long, and the breech end of the barrel really is square, not octagonal, for the first nine or ten inches. It has no buttplate or patchbox, but you can see it has a "tallow hole" in the butt.
It is noteworthy that the ball for this rifle would have weighed about an ounce. That's a big ball, but I have found several references from the 18th and 19th centuries that mention rifles (not smoothbores) of this caliber. They did exist. I would like to point out that a lot of hunting rifles were commonly of much smaller caliber or gauge, but as people started moving west, they encountered more big game. Kentucky was said to have been rich with bison in the mid-18th century, and people were beginning to move there about the time this rifle would have been assembled. The other thing is that horse-mounted cavalry was an important arm of every military organization, and rifled military weapons were typically made in calibers capable of downing a horse, right up into the early 20th century. If you take out the horse, you effectively take out its rider, and the horse is a bigger target. This particular rifle is usually associated with the American War for Independence. I don't
know that it was made specifically for war or for hunting big game, but I do think either of these concepts are worthy of consideration in speculating on the reasons for this large caliber.
What you can't see in this photo is a very Germanic or Scandinavian styled curving cheek-piece. It does have a musket-type sideplate, and a flared tang. The ramrod pipes are recycled. I don't think it has an entry pipe, just the two farther up the forend. I didn't remember a nosecap, but there appears to be one, and I think it looks as if it was cast in place.
There are a few more photos of the original, with some descriptive notes, right here:
The Digital Vault: American Rifle
There were at least two accurate copies of this rifle made some years ago, one by a Mr. Dodd. I think
@dave_person may have photos of the Dodd copy. It is my understanding that Don Getz made both of the barrels. If you search "square breech rifle" on this and the ALR forum, you might find more about it.
I had a set of full-sized, exquisitely detailed drawings of this rifle, that I bought some time in the mid-seventies, but I lost the drawings in a move about 30 years ago. I'm still convinced they are someplace on the family property... I just don't know where. The drawings were by a Mr. Curt (or Kurt) Hemlepp. I wish I could find them.
Anyway, back to the original question, this rifle is one example of a very simple, unadorned rifle which was put together at low cost. In my mind, those two criteria (simplicity and low cost) pretty much define a "poor boy" rifle. Chuck Dixon wrote a nice article about
schimmels which I don't think was formally published, but I was given a copy of it by a member of another forum. Mr. Dixon's thesis was that old-time riflemakers would put together a few rifles "on spec," when they had time, but leave them unadorned and unfinished, with the bare minimum of furniture. Customers could look them over, pick one, and dictate how they wanted it embellished with carvings, inlays and so forth, and how they wanted it finished. The 'smith would then complete the rifle to the customer's order, plain or fancy. Customers with limited means could have a rifle made simply, but with the same quality lock and barrel as the more expensive guns. This may have been how
schimmels came to be.
Best regards,
Notchy Bob