[mrerick]

I have a Hornady Lock-n-load press. it's primer insertion system works flawlessly if it's kept clean.

I wear a face shield (heavier than the ones sold these days at Sams Club) when handling primers and reloading - and am always very careful where the primer loading tube is pointed while I'm handling it.

The case is primed at the bottom of the down stroke (as you push the press lever) and you can feel it seat. The priming mechanism is in the right of the opening shot of this video. The tube of primers is inside a second steel tube.

 

[mrerick]

While it's a low risk issue, it can happen - which is why I wear face / eye protection when reloading.

If a primer is somehow not in correct position inside the primer tube, it's possible that the feed could crush the primer - and sometimes violently enough to ignite it. If it goes off in the tube it can set off others resting there.

A clear face shield is easy to wear, really doesn't get in the way and can protect you from serious injury.