[32-40win]

I acquired a 22-250 from Barotto's fire sale, exterior was fine, stock was perhaps discoloured a bit, rust strip plainly visible inside the middle of the barrel on the bottom. Shot it for a year, 3/4moa with 50gr Nos Expanders, same with Lyman 55gr GC cast, took it up to 2300fps with the cast, then rebarreled it to a 32-40.
I tend to subscribe to the thought that borescopes probably create more problems than they solve for folk, by way of cleaning causing more damage than what they thought was there.