If I’m not using a case prep tool head on a progressive, then I’m running on a RockChucker with a Case Kicker to speed things up. I run a good old Lee Universal Decap die and can fly through crimped primers with no problems.
I’ve been doing it for a long time and developed a feel for the stroke so I can feel the contact between the pin and the flash hole, then apply smooth stroke. I don’t smack the tool into the primer.
Another tip is to start out with segregated brass till you get the hang of it. Stick with all crimped for a session so you can get used to those without mixing in the regular ones. Slow down on the first ones till you can feel the difference at the contact point.
To start out, hesitate on the contact and then press. Learn what that feels like and the smoothness and speed will follow. The case kicker attachment is a must for reducing fatigue and minimizing the handling steps. With that kicker on the press, you can just reach for the next case as you stroke the press and it really speeds things up.
A new tool to watch is that Lee Automating Processing Press. If they smooth it out and get rid of the little bugs, that will also speed things up so you can focus on the decapping instead of the feeding.
I only broke on of these Lee tools in about 40 years worth of decapping lots of Mil-Spec ammo. They are cheap so keep a spare and don’t over think this. If you broke one, it probably was not aligned to the flash hole or maybe you ingested a Berdan primed case.
On the progressive head, the Mightyarmory tool is a good upgrade.
Good Luck and don’t worry.