Here is my Swarovski Z5, 5-30. I have the turret set for 143 ELDX @ 2605fps Say I have another load shooting the 143gr @ 2650fps any need to have a new turret built? Will 50fps make a difference out to 600. I havent got to go to my LONG range steel yet to see. Thought I would see if anyone here has "been there done that"