H&R and NEF made 9 shot revolvers of various types. H&R made a 999 Sportsman in various guises that was a breaktop model.The others models,newer ones at that,were swing out cylinder models.Yes, there were some 'cowboy loading gate,load one at time' revolvers made.
905,603, and various other models can be had on the use market.
NEF made a R92 in .22lrf that is a swingout cylinder model. Their premier model was called the Ultra revolver. Any of these models can be bought as .22lrf and there is a duplicate revolver in .22 magnum.6 rounds only for the .22 magnum though.
HKS makes a nifty speedloader that holds the nine rounds securely and
makes loading easier.
If interested Taurus makes a model 94 in either blue or stainless steel. There are shorty barrels or the regular 4 and 5 inch models. Hold 9 rounds of .22lrf.
HKS 9 round speedloaders work as well for this revolver as they do for the H&Rs and NEFs.
The 941 is a 8 shot .22 magnum revolver. No speedloaders made for this one.
Taurus 94 is my understudy gun to my .357 magnum revolvers. About the same heft and ballance as the centerfire revolvers, but cheaper to shoot.
Since getting the practical aspects of shooting down is the main mission and so is staying proficient, the .22lrf fills the gap. I can go longer with shooting sessions for a fraction of the cost of centerifre ammo.And accomplish anything I could with the rimfire.
I do fire enough of the centerfire rounds to stay up to speed.
Just some things to consider.