Okay. I went back and reread second response twice, and the rest of them once and now the 1936 date seems to make more sense. I guess he chamber length can't really be used to date the gun.

My 2.75" A-Zoom snap caps drop right in.

The shop I bought her at did have a decent selection of the RST shells on the shelf. But with 2.75" chambers do I really need them?
Will a few rounds of Winchester Super-X #6 shot hunting loads hurt her? I do also have some Remington "Express Long Range" #6's at hand. If I dig around I'm sure I can come up with some other old ammo.

Any thoughts on care and feeding?