I loved my Chargemaster (bought, what? 15 years ago?) until the cheap membrane key pad went funky. There's NO WAY I've gotten my money out of it, but the usually great RCBS customer service has been pretty useless on this one. I'm getting to the point where I'm going to take it out and shoot it, and post the video on their Facebook page.

They have just introduced a new one with an LCD touch screen. My advice (given my experience) is that you don't even think about buying one of the older variants (like the two you mentioned).

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