Ive seen people increase companion hp by over 120 with 4-5hp per level, thats 30-24 level ups minimum there, so i presume its eithe no cap or higher cap than players.
Also, is companion loyalty bugged or removed? Ive had mine for a few weeks, killed them a lot, and they still talk like high loyalty and afaik never run from combat. Ofc, im happy i dont need to buy thousands of booze anymore, but someone who didnt know this could easily fall for the i have some food for you dialogue.
Also, this is a kind of stupid question, but how does science work? Whats max skill? I got 125 science, 1 luck, dismantler perk, and most of the time i get just 0-2 parts. Is there any way to get most of what you made? I would like to see what LE bb gun, g11, power armor, etc give