I had purchase myself the Universal RCBS Hand Priming Tool some time ago. Works nice, but you would get a few primers out of a batch of 100 that would not align properly with the primer pocket and it would then gives you a click sound. Although it did not happen yet, I belief this could result in the anvil of the primer falling out.

After this episode I though to go to the RCBS Hand Prime which works with the shell holder. Alignment is proper here and no problems as above. However, one problem with this device is that should you turn the units head to the ground the seating stem would fell out. What is designers fault for such a nice tool. Easy to loose parts if you are not causious.

After the problem with the RCBS Hand Prime using the shell holders I bought the Hornady Hand Prime. The unit comes with 2 primer trays, one for Hornady shell holders and the other for RCBS shell holders. Perfect alignment of the primer seating, no seating stem falling out and I must say the unit requires much less sqeeze compared to the RCBS Units.

What is your evaluation on the above units?

Get the RCBS Universal Hand Priming Tool! It does everything from 223 to 450/400 3 inch. No shell holder needed!
And the primer tray is square to match the primer boxes!

I use the Lee hand primer, it works well. No problems at all and I've loaded many thousands of rifle cartridges with mine. I wore one out and had to buy a new one but they're cheap enough that it's not a problem. Currently I have two, one set up for large primers and one for small primers.

I prefer the press mounted Ram priming unit from RCBS, Lee also produces a similar unit, but have'nt used theirs. I like the controled seating depth, Every primer will be set the same, no guessing by feel. Not to say that there is anything wrong with that method, just not for me. I batch load on a single stage, and this is just another step.

https://shop.rcbs.com/WebConne...index&productId=2867

I have a RCBS with the universal jaw setup, it works OK for what use it has had. I had a Hornady unit, bought it as it used shell holders and thought it would be more versatile, ie; 450-400ne will not fit on the RCBS. It stuck a lot,the tray was a major pain to R&R, primers were constantly cocking. I tried honing the barrel on it to get it to work properly, gave up after a few days and chucked it. My temper eventually got the best of me on that one. I would have to recommend that people assemble and check function on them before leaving the store.
I used the round tray Lee for 20 yrs+. Had trays and pcs left over from wearing some out.
So, I picked up a 21st Century body. It is adjustable on the seating depth, uses the Lee tray and plunger and shellholders---and blows the doors off the old Lee and the RCBS as far as I am concerned.

I used a press mounted RCBS priming unit for decades but then sold it to go to the RCBS hand helds. After owning the hand held for about 3 years am giving serious consideration to going back to the bench unit.
Hand held - can prime while watching football games, big plus. But primers are often cocking in wierd positions and you have to play with getting everything centered sometimes. Either primer pockets are getting tighter or my arms are getting weaker because some times it is a bitch to seat some combo's of primers in certain brass.

Bench unit - does everything well but keeps you at the bench.

Biggest initial pain with the RCBS Universal so far(only arrived Friday) has been the primer tray lid.
Several reviews mentioned how it snapped into place rather too smartly & thus flipped some primers in the tray.
It is indeed too stiff.
I gently chamfered the edges of the central hole in the tray & did the same for the locating nub in the lid but still had issues with the odd flipped primer.
I cured this by initially seating the lid 45 degrees off from its seating position then rotating into alignment & pushing it down the last little bit - no more flipped primers.
I know tools such as this shouldn't need tweaking but I'm happy with the result.