Anyone ever try fine valve grinding compound? It works on scope rings.
In the mode of confessing our sins… I will admit to using fine valve grinding compound on a bad bore one time over 40 years ago. It worked. The rifle improved accuracy dramatically.
I shot some military surplus ammo one day in my 03-A3, and did not get it cleaned that night. I think it was the very next day that I was horrified to see a fur like growth of corrosion in the barrel. Cleaning it removed the fur but not the heavy, erratic lines of etched metal.
I was somewhat isolated that winter in Canadian hinterlands. So I used the only thing I had, which was valve grinding compound, and I used the fine side of the circular double sided container. I can’t recall now but think that I made five precisely identical passes each direction through the bore with an evenly coated tight cotton patch, then scrubbed and cleaned out all trace of the abrasive. A fine etching remained visible in the bore. I assumed that I had ruined the barrel.
While I was at it I took a brass round head Phillips screw, coated it with some of the fine grind valve compound and carefully and slowly rotated it by hand in the muzzle, cutting/polishing the end of the lands and grooves. I tried to be consistent and equal with angles and rotations each direction.
I'm not sure why but that rifle suddenly started shooting consistent half inch groups with 165 grain Sierra bullets. Before the corrosion and treatment it had consistently shot about 1 MOA with my best handloads. The barrel never quit showing the fine etching.
After 20 years as my only big game rifle I traded it off to buy a new Remington 700, and have never found as accurate an 06 since, in a half dozen tries. Wish I had it back, etched bore notwithstanding