I am not a traditional Benchrest shooter. If we had that type of match around here I would though. I shoot benchrest silhouette to 200 meters.
I’ve had tuners before. Not a big fan. I have a tuner on one of my rifles presently. The other day I went through I don’t know how many rounds of SK and Wolf and center-x, trying to find that holy grail sweet spot. Never did. The rifle shot the same pretty much no matter where I set it and at either extreme end.
The bottom line: Your rifle either likes what it’s being fed or it doesn’t. As someone already said. A tuner will not turn a pig’s ear into a silk purse. Green tag is garbage. Chrono it and see what you get for SD. That should be all the proof you need. The further out you go, the more important SD becomes. That’s why you need good consistent Ammo. There are lots of cheap Ammo that will turn in tiny groups at 50 meters that are virtually useless out at two hundred because at that point they are printing like shotgun patterns due to velocity variations among other things.
Get yourself a bit better Ammo. SK and Wolf are a good place to start. Last time I checked they weren’t giving green tag away, yet it isn’t much better than most of the bulk stuff you can buy on any shelf. Listen to these guys. They know what they’re talking about. Tuners are basically the last thing you go to for fine tuning after you’ve done everything else. Ammo is the primary place to look for increased accuracy if the gun is up to snuff.
My .02 cents FWIW...