Hi,
Let's be clear here folks, the OP said a period including the 1600s to the beginning of the 1700s. German immigrants probably did not show up until the 1680s in the colony of Pennsylvania and some may have brought rifles. I doubt there were many if any rifles in Virginia at that time except for a rare English rifle here and there, which quite possibly could have been a breech loading "deer park" rifle. A land owner with means would most likely own a good quality English smooth bored gun made in London. Now what would that look like. Well, not like a mid-18th century English fowler. It might have a good quality dog lock or perhaps even an earlier type 1 English lock converted from a snaphaunce. Makers such as Tarles, Brook, Crisp, Barnes would all represent mid-late 1600s production. Later near the turn of the century styles by Dolep, Lewis Barbar, Humphrey Pickfatt, and Nicholas Paris might represent good quality sporting guns. These would have flintlocks usually with Dutch or French characteristics and borrow heavily from those countries with respect barrels and stocks. Any engraving would be simple "strawberry leaf" style until almost the 1700 and then more sophisticated French designs would start showing up. No Virginia long rifles, no mid-18th century English fowlers, no Northwest trade guns. If the owner was involved with militia (trained bands) during Bacon's rebellion and suppression of native Americans, he might also have an English or dog lock musket or large bore carbine (not anything like a Brown Bess).
dave