stainless steel-vs-matte-vs-polished blue

[Jack]

As to the 'visible when hunting' question, I'd say the finish is more a factor than the material. In other words= highly polished (stainless or blued) can reflect. Matte finish (either material) is less likely to throw a bright reflection.
The color itself, silver or blued, I doubt it makes a difference.
As to accuracy, in the hunting world, I doubt very much there's a tangible difference.
Bench rest shooters, who junk barrels when the groups open up to .2 inch (that's 2/10's) seem to think that stainless barrels have a slightly longer life- and I do mean slightly.
For us mere mortals, and conditions in the field, no discernible difference at all, IME.