look around on this forum. you will find several discussions about misfires(fail to fire,). that are traced back to not seating primers below flush.(not just revolvers)
some people just don't understand (comprehend)below flush. they need a number. Then they need a way to measure that. I use a set of calipers to set up my 1050. No special tools needed.you need a set of calipers any way.
OP specifically said he did not want to use his calipers. I use a tread depth gauge to set up crimp on shotgun shells. Could use a set of calipers. But not as easy as it sounds.
That's why I recommend it for primer depth.