But ten inches is _not_ high for all these 70/30, 80/20, 90/10 and so on shooter who post here, Johnny.
Of course the conventional mathematics of the percentage system - three inches equals 10 percent - is completely out to lunch and makes no sense to anyone who has ever seen a pattern. It's just nuts; there's no other way to put it.
Mike Campbell apparently disagrees, but the fact is almost no one ever tests the POI of their gun. Not seriously at least, not so they should have any confidence in their belief.
As someone from Metro Gun club may attest, I spend a lot of time at the pattern board with all my patterning, POI testing, throwing balls for Kyra. I can't think of anyone if 30 years who I thought did a passible job of determining POI unless I dragged then through it.
I find it embarrassing, the helplessness they exhibit, the need they have for someone to reassure them about they have just seen.
In the 70's I signed up for initiation into Transcendental Meditation, the cure-all of the day, call it proto-gluten-free. It was a lot cheaper then than now, I understand, but a lot of my associates were finding their bliss there, or so they told me. I presumed they were just following a script they thought they were expected to buy into but I did want to at least do a drive-by.
The high point was getting your own personal mantra, whispered to you since saying it out loud would strip it of all its power. This mystical syllable had been picked specifically for you and would be your ticket to - well, it turned out, a ticket to spend a lot more money and maybe being able to cash in big later.
Anyway this 70/30, 80/20 mumbo-jumbo fulfills the same role as my mantra. And is of great value because it is, basically, magic.
Here's a representative interchange:
Neil: OK, Ed, that's great. Now that we have things set up so we could reliably reproduce your shots, you have put four of six shots in the same place in relation to the cross you were shooting at and so we can estimate that your gun shoots about two inches high here at 13 yards and will continue to shoot maybe five inches high both at singles and handicap.
Ed: Is that 80/20?
Neil: I don't know Ed, I don't think of it that way. It's about a hand-span high. That's a popular place to have a trap-gun shoot and I'd say you just have nothing to worry about, POI-wise. Take the paper with you so you can look back it if you want to.
Ed: (Pleadingly) But how high is it? 70/30?
Neil: Ed! Listen! Watch my hands! It shoots about this here; it will shoot about this high out on the field.
Back at the club I hear Ed telling his league-team members. "Yeah, I tested the POI at the patten board and it shoots 80/20, just as I thought."
It's really something how a system that is so clearly full of errors has taken over the minds of trapshooters to the extent that they don't dare think straight.
Neil