I use the K&M without the dial indicator, and the feel is excellent, but as good as it is I think the Sinclair is a little better. But on the otherhand the feel means little if you know exactly where your at in seating the primer. So I do agree with you about the K&M. But to add to this, I've also found that seating Federals seems to work better with the K&M than just about anyother seating device I've seen (I pretty use nothing but Federals and CCI's). I've owned the RCBS handtool, and it's a toy compaired to the other two.IMO, the problem with either is that primer seating should not be seen about consistency in depth, but consistency in function.
The ONLY primer tool that provides this is an indicated K&M.
It's the only tool that measures pocket depth to uncrushed primer height for zeroing, and indicates the desired crush of fully seated. All other tools are based on pretty much nothing that could be considered a standard for primer function.
yet the vast majority of IBS shooters use a Sinclair (I don't). The idea is to be able to feel the primer crush as it's seated. My hands are so screwed up these days that I really can't feel the crush very much at all, and will agree with you that the indicator setup would work better for me.'Feel' is merely merchandising.
The indicated K&M directly demonstrates this..