I just changed the recoil lug on my 260 Rem. 110 using only a go gauge.
When putting brass fired in that rifle in my Model 7 Remington in 260 Rem, the bolt closes easily so I think it's OK. That's not the way I like to do things though so I now have a no go gauge for when my new Shilen arrives.
I wouldn't be afraid to use the shim method either, just didn't think of it.