Interesting ... I use the same lube: mutton tallow - paraffin - bees wax for all the calibers I shoot, pistol & rifle including 30-30, 220 Swift, 308 and have never had bore leading or lube starvation with smokeless and black powdersWhen you get into magnum handgun loads you need something with alox/beeswax or even better Lithium / beeswax or one of the lubes designed for heavy handgun / rifle boolits .