Just got a Mod 7 predator myself, in .223 to have something lighter, and more usable for hunting than the Mod 700 varmint HB .223 that I already had. With my 700 I can routinely get .25"-.35" groups. Best so far with the Mod 7 has been .4" group for three shots. Groups for me, on the Mod 7, tend to open up after about six shots, and somewhat string, unlike my 700 varmint that I can shoot at will and still hold grouping. Also my Mod 7 seems very load sensitive, unlike my Model 700. Another thing is that I cannot even begin to close the bolt on my mod 7 when using a shell loaded for my Mod 700. I was really hoping to be lucky and be able to use the same load for both.
Loads for 700 and Mod 7 are
700- Win748 27.8 gr Nosler 50BT OAL 2.250
Mod 7- Win748 27.4 gr Nosler 50BT OAL 2.245
While my 700 will shoot most anything to almost the same point of impact, on my limited testing with the Mod 7, just a change from spritzer to boattail, moved the group over 4". Also .2 gr change of loading, and my groups really opened up. So for now, a .4" three shot group, is good enough for me to hunt with for the time being, but I will be bedding it when I have time next summer, to try and get a little more uniformity. If yours is a .223, you might want to try my loading, but start at 27 gr as I had high pressure signs at 27.6gr. Accuracy for me in both rifles, has been best at max loads.