I disagree... the 57 rocks! The penetration and rof really do make up for the lack of damage from this gun.
Picked apart a Lowe last night... first I nibbled away both of his tracks, then I must have damaged his gun or his turret ring or something because he could no longer target me... I scooted to his left and pumped two more rounds into his side and rear... and he burned up.
Sure, it took me about 8 shots to bring him down, but I think I would have gotten smacked away before that if I had been tagging him with the lower penetrating and slower 75 howitzer
Just my opinion.