Hi patton- welcome to the forum- when you get a second, stop by the intro thread and say hello.
I checked about 6 fairly reliable cross reference data bases- unfortunately, like yourself, no luck. Odds are your rifle is a Savage. If you have a Blue Book of Gun Values, or Standard Catalog of Firearms, you might spend some time browsing the Savage photos, and see if you have a close match.
Regrettably, some of the Store Brands were in small numbers or for a short time, and they never go catalogued. I have a couple of Pioneer Stores 22s that are in that group. They are Savage rifles, but not shown in the databases. Sorry-