I'm asking this question because I really don't know. What size would a small mature bear's weigh and about the shoulder height? This would be a bear of age to have had cubs or the age of a male to be a breeder. I remember seeing a small bear that was classified as an adult. What is the smallest mature bear you know of?
That's a god question. Look at the PA bear harvest figures from last year. Should be on the PGC website somewhere. The ages and weights are all over the place. From 180 pound 10 year olds to 350 pound 2 year olds. Males are generally bigger, but weights are all over the place and not always aligned with age.
There are sows that are 10-20 years old killed every year in pa that weigh 130-150lbs and possibly smaller than that. The age harvest data on the pgc site is very interesting to look at. It's amazing the variation probabaly mainly food source related but who knows.
There was an 8 year old female killed at 90 lbs last year. All bears are old enough to survive on their own by the time hunting season comes around, so thats why all bears are legal targets. In the animal world, if you can survive on your own, you are at least to some degree, considered an adult.