The Samsung 25r is a 20amp CDR battery which means that it can handle a .21 ohm build which puts it at its 20 amp CDR limit is it recommended no you never want to push the limits of your battery. You can safely build .25 and enjoy it and here's the other thing a continuous drain means holding the fire button until the battery is completely dead nobody is every going to do that. We as vaper's are only pulsing the battery for maybe 3 to 6 seconds so this is why you see guys building .06 ohm builds on mechanical
mods and using these
batteries, at 294 watts you aren't going to be pulling on that for more than a second or 2 this does however create a 70 amp load and has the potential to end up bad so stay above the.21 range and you'll be fine and 26 gauge wire is a great all around wire I use it a lot especially for the plume veil.
here's some pics of builds on my plume veil clone