I am installing 3/4inch golden teak hardwood floor.. Can I use a 16 gauge floor nailer to install or should I be using another gauge??

We want solid hardwood on an upper level of the house, including kitchen (not mud room, though, which will be tiled). Not sure if click or nail right now, but I've narrowed down to strand bamboo. Although this is a fairly new product (two stores said they've had for 10-15 years, so maybe that isn't so new), and it is kind of like MDF, it seems extremely hard, easier to install (better consistency between planks), and I'm told is as dimensionally stable or more so than engineered lumber. We're looking at carbonized bamboo, for the color. This lowers its hardness, but we do not have dogs, and I think it's still pretty up there on the hardness range when carbonized. I know the glue can be unhealthy when moist but presume (hope) in its cured state it's totally benign. At lumber liquidators it was about $4 square foot with 50 year warranty. I found a link that says "Most Manufacturer's recommendations require installing over solid wood or plywood and most homes do not have plywood underlayment.". Our subfloor is OSB, though. Neither of the stores we went into mentioned the material of our subfloor being important.