vaping devices with VV are meant to be used with SR cartomizers (2.5 ohm and higher). LR/DCCs are meant for 3.7V devices. Really don't know why people insist on using LR cartos on VV devices. It just make them useless.
I use LRs on my 14650/3.7V mod and it performs fantastically.
I don't have a VV, but it's basic common
sense to me.