the all men are limited to only some, all of which receive Justification unto life !
Romans 5:17-18 For if by one man's offence death reigned by one; much more they which receive abundance of grace and of the gift of righteousness shall reign in life by one, Jesus Christ.) Therefore as by the offence of one judgment came upon all men to condemnation; even so by the righteousness of one the free gift came upon all men unto justification of life.
The word "receive" in Rom 5:17 is translated from the Greek word lambanō which means actively lay hold of to take or receive, to lay hold by aggressively (actively) accepting what is available ... emphasizes the volition (assertiveness) of the receiver - HELPS Word-studies.
In Rom 5:18, the first all refers to all humanity ... all descendants of Adam. The second all refers to that part of the first all who lambanō ... (they actively lay hold of ... they do not reject the gift of righteousness) ... by grace through faith the justified ones are reborn into the Last Adam, Christ.
.