Yes I flinch occasionally. Not all the time but especially if it' s been a while since I' ve been on the range. Easily fixed by dropping down a calibre or two and firing a few rounds, then reverting back to the first gun.
Most recoil I' ve had was from a Live Capture Net Gun. Don' t make the mistake of putting one of those babies on your shoulder. Definitely a shoot from the hip gun.
They shoot four steel weights that are about 1/2 pound each. The net goes about 40 feet or so.
Upper limit of what I' m comfortable with, 7mm Mag. 175 grain and hot load.
Unlike others in this forum, I' m not a fan of the larger calibres or long distance shooting.