I havent really bothered testing it out to 45 yards yet, as im not happy with it compared to the HW at 30 yards yet. It will put a 17 shot mag through less than 15mm - 20mm at 30 yards. I am using shoot n see dots on my targets which are 1 inch and all shots group to within 15-20mm inside that.
I am familiar with the re leading process needed, but as you say a good scrub through may do it a bit of good...hence my polishing question.
It is a secondhand barrel, but appears in perfect working order apart from just not being tight enough on the groups...yet
Theoben TTR1 .177, Steven B Blue/Grey Laminate Stock, Nutshot Mod, Falcon Menace 10x42 B20 Ret