I would consider all of your choices good for what you want the gun for. For me, it would not be that hard to decide.......
First I would take out the less desirables.....327 necked to .224 is going to give you fits as in brass and primers backing from the cylinder at the loads get hotter so they don't wanna fit no more. .22 mags are $9.00 a box of 50 and you cannot reload them.
Down to the 327 and the 32-20. For me, I would take the 327 because I don't have one. (Yet!) Good responses in the prior post regarding the brass. You can, for all intents and purposes, shoot .32 S&W, .32S&W Long, .32 H&R Magnum, and 327 Federal in the 327 Cylinder. Lots of options there. As long as you have the brass, you can also work up loads using shorter brass with longer bullets. (I have a load with RCBS 165 Silhouette bullet with 32 S&W Long brass for my Ruger.)
The 32-20 is also a sweet round. You can have 750fps plinking loads or work up to 1500fps powerhouse loads.
If you get the 32 caliber gun, you always have the option of getting another cylinder, or in a sense, both 32-20 and 327.
Either of the 32s would be a top choice out of your 4.
Steve
