I think mine is a RCBS I use it with a shell holder instead of the crappy multifit gizmo it comes with. Have removed quite a few with it and no breaks I hit it against a concrete floor. Breaks seem a pretty common occurrence from the number of complaints I have read online.
There’s half a dozen varieties, none of which I use so I’d have to go with the gizmos that come with the hammer.
The whole idea of a plastic hammer smells like planned obsolescence to me but it seems my only option other than taking it to popo and letting them deal with it.
For the quantity that you have, your best option is the hammer. They are all much of a muchness, I have smashed one exactly like you - the plastic retaining nut went. There are dies with bushings… I use those when I have A LOT of mistakes to deal with, I highly recommend those. But for a handful of ammo, kinetic hammer is your best option (to preserve the bullet).
I’ve broken one, but then the one I replaced it with has been going strong for 20+ years. Pulling factory ammo with a crimp is hard on them, that’s how the first one broke, pulled 120 rounds of RWS 6.5x57, both the kinetic bullet puller and me were stuffed at the end of that session.
FYI
Die works really well for jacketed bullets, but if you are pulling cast, it will damage the pill. I use it to pull jacketed bullets, to reclaim everything neatly. Or cast, when I need everything else and bullets go in the melting pot
There’s a tendency to overtighten the retaining nut, that plastic bit at the top that secures the collet that holds the case. I recon this and using wrong sized collets (eh close enough) is the cause of breaking them. At least for me, once.
My old one was RCBS. Belted the living day lights out of it. Whacked it on the bench, on the tiled floor, the press, the safe. That thing was amazing. Eventually died of broken collets. The plastic outlived the metal. Thousand rounds or close to, meaning four to eight thousand strikes.
Finally managed to pull these 357 PPU…The bullets measure .355-.356…so if they dont shoot in your .357 then this could have something to do with it…Some took 20 hits with puller, and some took a whopping 1 hit!!! I give PPU 2/10 for consistency…
Its too hot for my Martini…Jams it up. She might be getting a bit loose. Or the brass rims are too thin, but they measured only .005" under spec, which is probably normal tolerance…Loves my swaged goodness…so thats the main thing!