Well Jackie,
You're the only one then that I've heard of who's had long term success at it. My guess tho is too that you're one who puts an aweful lot into shooting, thus, getting a lot out of it. Lets face it, those who work the hardest will generally do the most winning. I suspect that if the rules changed tomorrow and you could no longer have your tuner, you would be equally as competitive after as before.
If you are convinced that your tuner is helping matters, then that's about all that's needed. Even if it doesn't, but it makes you more confident at the line, it's probably going to show up on paper. I know when I've had guns that made me confident at the line, it seemed like they shot themselves (and I think pretty much they do).
I hope you're not making the statement about people who never shot a match and referring to me. I would be making a guess, but I'd guess that I have more experience at short range benchrest than you have at 1000. I've tried both games and because of the fact that the biggest range I have closest to me is a 1K range, I do that most. I don't think the two disciplines are all that different from a hardware standpoint, other than our guns are bigger.
Rimfire guys all have em. Centerfire guys are split but I'd say way less than a majority have em. Intermediate range guys don't seem to use em, and in long range they're near unheard of. Is it the distance that makes em work or get lost in the noise? About all I've ever seen em do is make a gun shoot bigger. That's just me.
Let's face it, each year, even if we do nothing different whatsoever, we will shoot better than the year before because the vendors we buy our stuff from make better stuff. It's just a fact of life. We'd better be improving or we're doing something wrong. Barrels get better, actions, bullets, primers, powders, scopes, everything. New materials are available to use, new manufacturing techniques, NICER MACHINES to work on, etc. There's a zillion reasons why we shoot better without even considering any or our own efforts adding to that improvement. Without having ever met you other than reading posts here on BRC, I would not accredit your wins to that tuner. I would say you win through time and effort invested. (and money I suppose, though I'm not a believer in money being a big crutch. I spend virtually nothing on shooting and I win.)
You are correct that my standards are lofty.