BMT Mooner is by far the best tool for loading and unloading moonclips. Their version for rimmed cartridges (38/357/44) is spectacular. Their version for rimless (9mm, 40/10, 45ACP) is nearly as good. Each model is for only for one specific moonclip size. ie you need one version for a 625/325 and an entire different one for your 38/357 K-frame etc. They are pricey but worth it.
The
Moonclip Tool (and its copies) is really good for loading the moonclips. It can be quickly and cheaply adapted to many different cartridges and moonclip sizes. It's what I am currently using for my rimless moonclips. To unload them you can use the Moonclip Tool there is a demooner on the other end of the handle but its a bit awkward to use.
I use a home made de-mooner I made from a tubular golf club handle. This lets me easily separate loaded rounds from empty rounds on partially expended moonclips. Just cut off the handle at a diameter slightly larger than the case you're de-mooning. Leave a raised step that spans about 1/4 to 1/3 of the circumference. You slip the handle over the round. The raised step goes up the outside of the moonclip. A gentle twist will pop the round/empty-case easily off the moonclip and it drops into the handle. When full, you dump the handle into your brass bucket or ammo bag for reuse. My handle will de-moon three 625 moonclips before I have to empty it.
That said I used a pair of cheap channel-lock pliers and that golf club handled for years before I splurged on the fancy tools.
Since your buying a 325 I would suggest looking at
Ranch Products for moonclips. You can spend more on moonclips at
Revolver Supply or
TK Custom (Both are great vendors with great products) but for the 625/325 Ranch Product moonclips are excellent and by far the most affordable.
ETA: added links, pics and more info