not much help in the 17 calibers. I have 6 or 7 bbls in 22, 6mm and 6.5 and I use David Tubbs Final finish, maximum of 5 of those coated bullets down a new tube and it is broken in. Barrel delivered yesterday, chambered in 6mm rem AI took just three shots. I am pretty sure you cant get that product for your caliber however. I used that coating , the W-2 on f class bullets for about a year. My experience and that of others was that there was a major drop off in accuracy over time. We are in AZ and wondered if it was the summer heat or some other issue. This was a very big problem at the 800-1000 yd lines. Even Mr Tubb stopped using that coating. Just one man's opinion of course. I had no problem at the short ranges with the coating. The 4 of us who were using it went back to the standard moly coatings.
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