Yes, DART does a bang up job with waxes. Harborside (Huge Dispensary in Oakland, the state's largest I believe) had some very nice Sour Diesel Wax a while back at $35/gram. I probably bought 10 of them and only have a couple left. A couple went into Omicron carts but most gave their all in DART .05 grams at a time. Volume wise my favorite 'fuel' for DART.
You can load more, but my advice remains 'load small and often'. Top up when it runs low, every 6 to 10 hits for me if I get fat ones. A couple sessions for me. Reloads are fast and easy. Under half a minute. Pull the tip, dab up a BB size lump on the tip and replace. Loading more, up to the point of flooding it out, and it gets slower and the taste suffers. IMO adding .25 at a time is too much by twice at least. I recommend no more than .1 at a time. I think that serves most guys best, but your call.
I'm using a 3.7 Volt DART, but also use a SV Revolution, the same basic thing with window rather than DART tip, it too works just fine. Either will work for you. If you don't have SV stuff already, I recommend LV as there are more supply options.
BTW, consider the TV 'Alpha' supply (14500 based), IMO a great combo with DART:
http://thermovape.com/collections/all/products/alpha-ultra
You're welcome, best wishes.
OF