Aren't the VV powders both single & double based, hence the numerical differences?
Yes the 500 series are double base but VV calls it Nitro infused like they soak it in Nitro or something proprietary.
"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli
