Inertia bullet pullers are NOT hammers and the word hammer should be totally removed from your vocabulary when talking about pulling bullets!
I have had the same RCBS inertia puller for well over 30 years, plus another relatively new one that someone gave me when they broke it. So take note of this: if you manage to break your RCBS inertia puller, RCBS will replace it for free! That's right up there with Dillon's customer service, which is unmatched in the industry. If you send them your old, case scratching size dies, they will refurbish them for free as well!
The keys to using an inertia bullet puller are your wrist and patience, especially with lighter bullets (.22's are the worst to pull, although I suppose any caliber smaller would make one scream eventually!).
Again, these tools are not hammers and if you use them like a hamner, they are going to break quickly! When using an inertia bullet puller you use your wrist, not your arm, to drop the tool. Technically, you could drill a hole in the handle and hang it from a wire and just drop the head on a hard surface and it would work, although it would take longer. You should rest your arm on said hard surface and just use your wrist to raise and drop tge tool head onto your hard surface. I usually just smack mine onto concrete, which works just fine. Keeping the tool head at 90 degrees to the surface akso helps, as hitting the surface at any other angle will damage the tool head and not impart as much inertia on the bullet.
Keeping the lock ring tight will also extend the life of the aluminum collet that holds the shell head in place. If the locking ring/cap gets loose it will quickly batter the soft aluminum collet into uselessness!
Keep in mind you are dropping the tool head onto a hard surface, not driving it down as if to drive a nail into wood. Of course, you can put more speed than just dropping the tool head when using your wrist, but not nearly as much as when using your entire arm to beat the thing out quickly. This is where patience, and sometime loud, fast paced music, can help! I have had .22 bullets tgat took over a hundred strikes to get the bullet to fall out and if you have more that a few rounds to take apart, it can be a chore! Seating the bullets in a bit deeper always helps if pulling bullets that have been seated for a while or crimped bullets. You tap the tool head on your hard surface, not mash it on there with all your strength. However, that would work if you could keep the tool at a perfect 90 degrees to the surface, which of course, you cannot... which is also why you bend so many nails!
Remember, Grasshopper, tap, not smash! And patience is a virtue! Just kniw you'll be tapping for a while, it's just part of the process. If you have zero patience, use a collet puller on your press, it will save you a lot of aggravation!
Cheers,
crkckr
P.S. i just put some tissue or paper towel in the bottom of my puller to save soft point bullet noses. Ear plugs work just as well but I use them in my ears, with muffs, as I have already lost enough of my hearing!