[Tommo]

I always wash out the bore, bolt face and gas system with WD40 immediately after shooting Chinese or Czech ammo with corrosive primers. When I get home, then clean the bore with Hoppe's Bench Rest Nitro Slovent and another patch with WD40. After a week I wipe out the bore again and give it another patch with WD40. Never had a problem when using this method.

 

[Tommo]

I always wash out the bore, bolt face, flash hider and gas system with WD40 immediately after shooting Chinese or Czech ammo with corrosive primers. When I get home, then clean the bore with Hoppe's Bench Rest Nitro Slovent and another patch with WD40. After a week I wipe out the bore again and give it another patch with WD40. Never had a problem when using this method.