I use cappers simply because they are faster and easier than fat 'ol dirty fingers are at the same job. The cappers don't loose caps in the grass, my fingers do all of the time, and at almost 4 cents a piece, it gets expensive dropping them in the grass. I prefer the tear drop design by Ted Cash. It will hold almost an entire tin of caps and is easy to load, just dump the caps in, bump it a few times to turn them all over the right way and you are good to go. The in-line capper that I have only holds about 25, and is slow to load, does as well as the tear drop style at getting the caps on though. My cappers work great on my Colts and Ruger OA, they will not work on my '58 Remington. I have been told that there are no cappers designed for Remingtons, wish sone one would come up with one!
As a side - you say you are squeezing caps to put then on your C&B. If you are doing this to ensure they stay on, you may have caps that are too large for your nipples. You probably should try a different brand cap in the same size or go down one size. Loading with wrong sized caps is a leading cause of chain fires, you want to be sure you have the right size for your gun.