You know Angus you got me to thinking it has been awhile since I used a carto on higher voltage.... meaning before I have been using Dk juice.... I have used walrus and TV juice but realized only on 3.7 sooooooo I filled up a carto with TV juice and gave it a whirl
now I didn't try 6v but I decided to try it on my PT that puts out 5v and I would have to say I it is impressive.... now I still think my 510 and 306 produces more vapor (dripping/dipping i have NEVER tried the 510 or 306 with carts) but I have a stronger respect for the carto now(hv & good juice)
Don't get me wrong I always loved the cartos (my first vape,,, and my easy go to selection) but you have shined some new light on the matter.
Still dont get yourself to vape it dry if you do that fill will become toast
Give it a shot at 6v. It just gets better.
I vaped it all night last night at 7.4v (really 8.2v on fresh batteries) making sure to top it off a couple of times, and it was very, very nice. All it took was a real quick hit on the button to produce a lot of vapor, and unlike the 510 at that voltage, the flavor was still good. I wouldn't advise holding the button down more than a second at this voltage, because it gets hot so fast, but you really don't need to.
I'm going to try doing this on the same cartomizer until I am stupid and don't refill it enough that it tastes burned, or until I really kill it with the voltage. So far I've been using this same carto for a week, and it is still going strong.