I have been a faithful user of the RCBS hand held priming tool (uses standard shell holders).
I know it’s strengths and short comings well.
Yesterday I tried something new: I lubed two prime lower leverage points very lightly.
I was very impressed with the dramatically improved sensitivity and less strain to achieve well seated primers!
I know all the admonishments about no lube with primers with those tools. I did not use oil, I used Hornady die lube that is a semi solid in a tub and used it very sparingly. First I cleaned all the black oxide and ground metal out of the mating surfaces and then placed a bit of the Hornady product in there.
The seating required less strain and the feel was much improved, strikingly so.
Three44s