Re: thoughts on RCBS priming system
If you look at the Dillon presses, the Hornady presses, and perhaps many others with a press mounted priming system, they all work about the same and that is:
You use a primer tray that you shake to get all the primers upside down then pick them up with a primer pickup tube. You then take the primer pickup tube and invert it over the primer delivery tube and transfer the primers into the press primer delivery tube. Most all have a sliding bar that moves under the case in the press and they get seated in the case on the up stroke. Some of these presses do it automatically and the RCBS Turret press you referenced does it with the push of a handle.
You don't actually handle the primers. You pick them up with the pickup tube from the special primer tray, and transfer them in bulk, 100 at a time, into the press delivery tube, never touching them.
I don't own the press you referenced but rather a Dillon RL550B (for about 25 years...same press) and the delivery is perfect every time. I suspect the same can be said for other primer system like this.
Years ago I had a LEE Progressive press and it was the most frustrating reloading experience. It broke every time I used it (I bought it new!). It is hard to imagine anyone who has used it and anything else to reload with would choose any system that is part of the LEE press over anyone else's.
RCBS makes excellent stuff as does Dillon and Hornady. If you are looking for a new press you need to look at them all including the Lyman Turret. All are better made than any LEE press. But of course, that is my opinion based on my experience. Others here may will differ with me, and still others will agree with me. Which press you choose to use is a controversial issue here. Buy whatever you want but the priming system on everyones press but LEE's will be pretty much the same as I described above. Maybe because that is what really works (??).