You might want to try a little Iosso or JB's scrub to see if hard carbon fouling is effecting groups? My 6BR bbl has about 175 rounds through it. Using JB's at 100 rounds noticeably shrunk groups.
You might want to try a little Iosso or JB's scrub to see if hard carbon fouling is effecting groups? My 6BR bbl has about 175 rounds through it. Using JB's at 100 rounds noticeably shrunk groups.
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