I have the ML MR. HOP in three of my AEG's. Galaxy MP5k, Echo1/JG G36k, and a JG Stubby M4. I currently use 70° in all of them. I used to have the 50° in them too and they had the same issue. After 100ft or so the BB's take a hard turn left and go straight into the ground. I use BLS. 0.28g BIO. In the MP5k I'm using the stock hopup unit and the ML Omega nub. Krytac 6.05 barrel. In the G36 I'm using the stock hopup unit and the ML Omega nub. ORGA 6.13 barrel. In the M4 I'm using a MAXX ME hopup unit with it's own concave nub. I briefly used a Lonex hopup unit with the Omega nub before I got the MAXX unit. Still had the same issue. ZCI 6.02 barrel. I can tell when hop is applied that the patch isn't lowered evenly info the barrel. The left side is favored. That would explain why they curve left, but why isn't the patch lowered evenly? With no packing on the barrel I can see that the nub is centered to the window and is lowered evenly. So why isn't the patch? Maybe, even though the keyed part of the packing is in the slot on the barrel, the patch is not centered in the window. I will reply with pictures as soon as I can.