First off I am shooting a 24" barrel Remington 5r in 300 Win mag. with 215 Berger Hybrids. Using Norma brass, CCI 250 primers and 74 grains of H1000 and seated to 3.63 OAL is where I have gotten the best accuracy. My velocity is avg 2600fps. i went up to 75 & 76 grains but my group opened up some. Will this 2600fps be good to shoot long range or should I keep tweaking to try and get more velocity?