bs, nl1000 does freeze in winter, its awful .i used to keep my maxi-ball inside my coat on second shot if i needed it.if you use roundball here in winter in pa. using nl1000 in your barrel and patch, oh my. its a bear to push home.i use hoppes blackpowder for my patchs in winter but i dont hunt with rb. i now use POWERBELT 295,no lube, clean barrel.thats 1 problem out of way at 5 above.