Re: Smoothing the Barrel
Run a search on Final Finish. I have an ongoing (hopefully soon to be completed when I find time) thread on this stuff.
I have seen the effects of it on probably more than 2 dozen barrels including two of my own custom barrels and can testify to the effectiveness of it. I have not seen any throat erosion effects as BH mentions, but I have seen it enlarge the throat a touch so that it looks like the throat has eroded forward. THis has had no detrimental effects on accuracy. In fact, I was just out to the range last week with my 6.5-.284 that has had FF run through it and it shot a 3 shot group at 100 yards in the low .2"s. This barrel has had about 1100 rounds through it and was becoming a nightmare to clean. It was taking about 12-14 patches of Coppermelt to come clean and now it takes about 3-4. FF works!
If it's not far, it's boring.