Belligerence and snark are not required...
What's being said is that it's not necessary to shoot for .2 ohms... the device can be used with .5, or .9, or 1.8 just as easily.
For instance, an 8 wrap, 3.5 mm, 28 AWG 316l coil with 8 mm legs (thinking of your coil head and not a deck) will come in around .445. Perfectly acceptable for a modern TC mod. Likewise, a similar coil constructed from 28 AWG Ni200 will come in at .133. Also acceptable.
For some making, and maintaining spacing, a coil with 19 wraps that going to be jammed into a casing... well, it's not necessarily easy, and it's certainly not necessary.
And, yeah... I've not built hundreds... only dozens...
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First, it's not beligerence nor snark, it's that at some point, the reality is:
- vaping has a bad rap to fight against already and providing bad information that could lead to someone ending up on the news is something that I try to avoid
- I frequent this site less and less because as of lately, providing information becomes an issue with people NEEDING to show their superiority, sadly, in most cases, by providing very little actual information, but mostly rants. Most will go in a thread that they have no experience, done no research or testing but somehow will have lots to say, but most times those comments will be to attack points and such because they don't vape in the same way... For example: Mech mod users or those that can't get TC to work correctly will go into threads where someone is asking about TC only to state how worthless and hype it is... does it serve the OP? no... do it annoy people, yes... do they do it over and over... yup.
That said....
Over the course of months, I've tested TI, N and SS in these cartridges a good dozen times each, then using various gauge, and also tested various ohm ranges. I also tested the various cartridges from Eleaf, Aspire and Vaperasso, including Aspire's RTA. I tested various wicks and wicking approaches and techniques.
I tested for how these would vape, the warmth, the air flow, and durability of coil.
In this thread, and with my rebuilding guide, I provided my end result of what was the best setup where the type of metal (NI), the resistance (0.2-0.5) range, the best wicking approach, results in a coil/cartridge that is vastly superior to the pre-builds in every way, and with proper liquids that have low or no sweeteners, can last up to a month, to a month and a half.
It's not just about how many wraps, it's also about the spacing, and yes, the number of wraps and wire size does matter as with vertical coils, the wick needs to work right, be supported correctly, not end up causing shorts, etc. I can give the pros and cons for every item concerned and offer my knowledge and experience to assist, I don't do this to prove something.
In the end, I'm answering the OP, providing info, experience, but others have a need to debate, argue, prove something, and I will admit, it gets old fast.
And btw check your numbers against the calculator:
You state:
8 wrap, 3.5 mm, 28 AWG 316l coil with 8 mm legs (thinking of your coil head and not a deck) will come in around .445.
And that is false
: Coil wrapping
This results in a 1.1ohm, not a 0.445
I am gathering that you had it on dual coils, but these cartridges are single coils. The factory pre-made ones are made with specialized equipment that allows them to do these cartridges as dual, but hand made, this is extremely difficult. (I tried several times with poor results).
Note that these cartridges do act/respond differently from RTA/RDA decks, being vertical builds, and how they wick, and the size of the coil being restricted to the size and shape of the cartridge.
