Ok all you experts, I need a little advice. I'm fairly new to handloading and have only worked up about 100 loads so far. I am loading 145 gr Speer BTSP over Varget in 7mm-08. I have done a step up from min to max checking for over pressure signs. I didn't get any of those signs but none of the loads grouped better than a 1.5"-2" grouping so I'm gonna start messing with the seating depths. Will a longer OAL cause enough concern for me to need to go through the whole "stepping up" process again or can I just take the best producing loads and go straight to messing with the OAL for those?