Apart from IXMOO's I do use "regular" reloadables. Kodak Snap Cap, some plastic ones and some Kalt's (about 30-40 of each).
The plastic ones are tight in some cameras and as stated before - if you overload them (30+ exposures) they can scratch. Also the felt trap is less than secure and I had it come loose.
The Kodak Snap Caps are good - but takes a while to learn. They are very secure once snapped together properly!
The Kalt and Kalt style cassettes are easy to use, but be sure that you truly "lock on" the lid. They can pop off if you squeeze them - or if you stuff too many in your pocket.
I also keep track how many time I use a cassette - after 5-6 times I usually dump them as the chance of lint or other solids getting trapped in the felt and scratch incidents is increased.
Also some of the plastic cassettes use a center spool that is slightly smaller diameter and if you use snap-cap's and plastic - keep track of the center spools as if you load the wrong one in one - it will jam!