I decide to reopen this thread, I been trying to figure out this issue on my own and since then I been shooting my riffle almost every week, and do you remember shot groups I posted previously, forget it, now I hardly get 0.9 MOA out of it and today at 500 yards I shot 7.5"- 9" 3 shot groups compare what I had year ago 2.8" - 3". Can the barrel get worn out that quickly, I probably only had 1K rounds through it???
I spend time trying to adjust bullet seating depth, I tried different bullet and powders, switched to 168 SMK and 175 SMK, also 168 A-Max, nothing improved my groups, this rifle was factory tested using 150 gr Federal SP and it shot 0.58", last year I had no difficulty with 0.35" at 100 and 2.85" at 500.... The only way it still shoots below 1" if the bullets are flying at speed 2400 fps or lower... But I like them to be at least in 2600 and 2800 preferably... Feel like it can't hold the pressure well...
Go shoot it. If it still works and doesn't load up with the orange stuff then what difference does it make?
If it does kick shots all over the place and/or foul unreasonably then you've got a couple options: New barrel, or try to polish it out. Maybe you'll get lucky and it'll lap out.
Understand though that running an abrasive (any abrasive) through a barrel has the potential for altering dimensions. This may or may not have detrimental effect on accuracy. There's no crystal ball unfortunately.
Good luck and be careful with the choice of solvents.
I stopped using KG12 back in the spring and switched to Boretech Eliminator, but before it I usually do few passes with KG-1 & KG-2 , which I flash with KG-3. How often, well usually after each shooting session 30 - 40 rounds...
Had anyone replaced barrel on TC ICON, is it the same as Remington, I never replaced barrels on my riffles, usually I would sell them, who makes barrels for TC, do they use standard thread, or I have to order blank and let gunsmith make barrel out of it?