I was just wondering if you have to adjust your lead on shooting boar with the bigger slower calibres such as 9.3 x62, 9.3 x 74, as opposed to the .308. At the moment i shoot a .308 at 2600fps and am thinking of going up to a 9.3 and didnt know whether i would just shoot the same or have to give more lead. From what i have learnt the 9.3 is about 2300 fps. Any ideas???