Inertia hammer but for 50BMG real problems. As far as reloading components you're probably OK with bullet I.d. and weighing them but what about the powder. I certainly wouldn't take a chance in trying to I.d. Powder
I've got this same one. I like it better than my collets because its faster. I just use a shellholder instead of the rubber band aluminum crap. Make sure if you use this one to tighten it up every other swing or so.