Thanks. The only difference I can tell between yours and theirs for sure is that you have Field Scout. I know that during the Beta, Iron Relic Rounds were in the perk slot where Field Scout is now. Those considerably improve Impact. Who knows. There could even be a bug that gives you both the effects of Field Scout and somehow the old Iron Relic Rounds effect. I remember when Killzone: Shadow Fall came out, adding the Flashlight attachment to the Judaz doubled its range and damage. Still waiting for someone to explain that one to me...