I D Shooter,
Before you lap the barrell, go and buy some common good quality factory ammo. Put the revolver on target from the bench. Then you will have a basis from which to talk to Ruger. They won't listen if you mention "reloads or handloads", they don't like them.
If you can't get a six inch GP100 to group decently at a standard range, say 25 yds with common ammo then there IS a problem.
You might fix it by lapping, but Ruger might fix it for free.
Before you lap the barrell, go and buy some common good quality factory ammo. Put the revolver on target from the bench. Then you will have a basis from which to talk to Ruger. They won't listen if you mention "reloads or handloads", they don't like them.
If you can't get a six inch GP100 to group decently at a standard range, say 25 yds with common ammo then there IS a problem.
You might fix it by lapping, but Ruger might fix it for free.