Thanks everyone. I really hummed & hawed about posting this group thinking everyone would yell BS!
Barrel tuners are a big deal on all rifles. Especially rim fires since you cannot "work up" a load the rifle loves.
Slug-O;
Your likely gonna need a new custom premium barrel if you want to milk 100% accuracy out of what premium .22lr ammo can deliver. Besides having a bore so nice that when you push a pulled bullet through it it comes out looking like polished jewelry, and a TIGHT chamber for A GIVEN PREFERENCE of ammo, and a GIVEN rim thickness allowance in your bolt for the average for that ammo, you will need the rifle well bedded, and a third action screw created in the set up.
After that.................................in my 25+ years of competitive shooting -this- rifle with it's low velocity and long 26" barrel is the hardest to shoot accurately I have ever owned. The bullet is in the barrel for like ever. I must preload the bipod hard, hold the rifle hard hard, have perfect natural point of aim, not foul the shot and even AFTER I perceived recoil the cross hairs better STILL be 95% EXACTLY where I wanted to hit when I broke the shot or no deal- Flyer!!!! This rifle has upped my over all rifleman ship and when I do drive it right it boggles peeps mind. When I miss one dot or tittle in the NEEDY & DETAILED firing sequence, I can end up embarrassed.
On top of that the wee little low bc PISTOL AMMO shaped bullet at low velocity is so effected by wind that if you pay close attention it will not only teach you wind "drift" (99% of the time considered a horizontal component) but will teach you up and down draft effects on the bullet per the movement of the wind over the landscape. It's a round I love to hate, the Yoda of rifle/caliber teachers- at range. Most days it baffles my mind at what it can do. Other days it convinces me I need to start over with a rubber band gun and I'm not worthy to burn powder. in the end, this is the most fun factor of anything I have ever owned that goes bang. Like a hot A$$ high spirited spunky buck wild girlfriend that despite the fact she loves you most, God knows what she is going to do next despite your best attempts.