Due to the action design of the 1890 and how it feeds from the magazine, I would recommend you let a real gunsmith take a look at it. It doesn't "pick up" the cartridges from the magazine, the carrier is the blind end of the magazine.
And by all means, make sure you have to proper ammunition. 22WRF is available in most sporting goods stores with a decent ammo selection, but that was not always the case. Until the last 10 years or so, it was not loaded any more by our commercial loaders, but thanks to Cowboy Action Shooting, many older "obsolete" cartridges are no longer obsolete.