Can't see that TBBC bullets have any nickel at all. Mfr. says guilding metal, which does not contain nickel.
The old cupro-nickel jackets had a horrible reputation for nickeling a bore. Strong ammonia or abrasive cleaners were used; sometimes bullets were treated with moly grease before firing to reduce nickeling. Ever see a .303 with a "silver" bullet? That's cupro-nickel.
Modern metal fouling is usually copper fouling. An ammoniated cleaner like Sweet's 7.62, or a mild abrasive like JB's or Remclean should work. So would electrolytic cleaning. The foaming cleaners advertised as being metal fouling removers would be worth trying.
The old cupro-nickel jackets had a horrible reputation for nickeling a bore. Strong ammonia or abrasive cleaners were used; sometimes bullets were treated with moly grease before firing to reduce nickeling. Ever see a .303 with a "silver" bullet? That's cupro-nickel.
Modern metal fouling is usually copper fouling. An ammoniated cleaner like Sweet's 7.62, or a mild abrasive like JB's or Remclean should work. So would electrolytic cleaning. The foaming cleaners advertised as being metal fouling removers would be worth trying.
