One issue you are likely to encounter is that many vintage .22 Smiths have tight chambers. This demands bullets that are consistently sized, and powder that burns clean, since a heeled .22LR bullet has to be pushed through the crud left by the previous shot. Ammo that fails on either count will have you cursing, because the cylinder will either fail to close, or the DA trigger pull and hammer-cocking force will be excessive due to the case heads dragging on the recoil shield.
I recommend pretty much anything made by CCI or SK (FYI, SK Standard Plus is the same thing as Wolf Match Target); the higher-priced Winchester Super-X
hunting loads (more info below); Federal ammo, particularly Auto Match; and, for cheap plinking, Remington Golden Bullets. Despite all the online vitriol hurled at the Golden Bullet, my M18 shoots it better than any other flavor of cheap bulk pack, and it always chambers readily.
I recommend
against Remington "blue box" Target (oversized), along with most every other Remmy .22 load besides the Golden Bullet; Winchester T22 Target (also oversize); Winchester 333 & 555 bulk pack; and pretty much anything made by Aguila.
FWIW I've read that some inexpensive so-called "target" ammo is deliberately manufactured slightly oversize to better fit the bore of a gun
without a match chamber. This is not an issue with a bolt rifle, but the article warned that it can be problematic with revolvers and semi-autos. I believe this is the issue with the Remington Target and Winchester T22. OTOH high-priced target ammo is
meant to be shot from a match chamber and is
not oversize.
The "crud factor" may also make it difficult to shoot .22LR after shooting .22 Shorts, and to shoot .22LR hyper-velocity loads after shooting .22LR. OTOH my M18 typically displays only fair to middling accuracy with .22 Shorts, so I generally don't shoot them in it.