Using any Aromasin on 250 test = limp dick. 250-500 is very mild and body deals with it well. Gram(s) and multiple compounds is usually where people start seeing issues.
Doses play a huge roll in gyno, est conversion etc...Which is why you will be hard pressed to find any of the 60's 70's guys with any gyno in competition shape...Being fat and having puffy bitch tits is NOT gyno it's called being fat lol...Gyno is a small round lump that won't go away even at 4% bf...
The old guys would run 1cc of an injectable and a couple orals preworkout...That's like 150mg primo and 20mg legit dbol/day. That will blow up a lean muscular guy with an impeccable diet 20lbs easy. Arnold was like 230 on stage lol that's 6'1 200-210lbs without drugs which is completely realistic. The bodies you see now are completely supported by the doses, you have 160lb 5'7" ectos like Dexter walking on stage at 220+
They didn't even have any of this shit back then which is why if they saw sides they tapered back like a logical human being, instead of continuing to push and cover things up with other drugs..