A couple of non-overstated durability and soak feats for Cap:
Tanking shots from Red Skull, who was absolutely going all out and who, as mentioned, put inch deep fist prints into a 3/4 inch thick bulletproof metal shield. As in: combat rifle bullets don't even scratch it.
You can argue that the bomb that launched Cap through the bank window in Avengers was absorbed by his shield. You can't argue about his body totalling the car it hits, and Cap just getting up and continuing the fight moments later (notably, once his hearing comes back).
Cap is shot 3 times by Bucky. He still manages to fix the targeting system, then jumps down and lifts a steel girder off of Bucky. He then plays punching bag to a clearly bloodlusted Bucky - not resisting or rolling with punches at all, and keeps trying to talk him down. Yeah, that eventually wears him out, but Ollie wouldn't have survived ONE of those shots to the head under the same conditions (not resisting, not blocking, not even capable of rolling back).
He got hit with a Chitauri weapon, one of those things that blows up a car, and while he feels it, he keeps on going from there.
Loki is strong enough to fight OK against a holding back Thor, and matches strength roughly perfectly with the "casually throws human-sized guys a hundred meters with one hand while wasted" Valkyrie. Cap takes several shots from Loki and doesn't even really slow down.
Cap takes numerous shots from SHIELD special ops guys, while one-handed and unable to dodge, and gets hit by multiple "this thing one shots everyone it ever touches except..." Stunsticks. And proceeds to dismantle all of them with no harm to show for it.