Yah I keep getting at least .02 under what steamengine quotes me. And when your building for .08 ... a couple hundredths of an ohm lower is a BIG deal. I checked VapeTool and it seems to come in a bit lower than SteamEngine and more in line with what I've been getting on the ohm reader. So, I'm guessing their formula is a smidge off.It's pretty close to my typical build 4x30/ 40 5 wraps at 2.5mm at .22 steam engine was .212
Resistance calculators should be giving pre-fire resistance. They always have. That is why people look for a .07-.08 ohm build knowing it will come up to +/-.1. And ohm readers should not be given a .05 leeway. It is unacceptable to read up to 50% off the stated resistance. That's like saying it's ok for a product to read at .5 when you've made a 1 ohm build. On average Steamengine is within .01. I can live with +/- .01, though I'm not happy about it considering the super-sub market is big enough now that we should be getting pin-point accuracy. But once we get closer to .02 you are talking about huge jumps in amp load. And once again that's unacceptable whether it be due to reader or calculations.remember that Nichrome always reads low before you fire it...pulse it a few times on something regulated or heat it with a torch and the resistance should come up 0.03 to 0.05....if you havent already.....) and 0.02 is probably giving an ohm reader alot of credit for accuracy within 0.05 is probably as accurate as a "vaping" ohm reader or most chips in mods are gonna get