I just got a slightly used Ruger no 1 in 300 win mag. What can I expect for long range shootin potential? So far I have only used cheap factory 150g Win ammo and I'm pretty impressed with the groups 1.5" at 100 yrds. It will be used mostly on big Saskatchewan whitetales and maybe the odd moose. This gun is a pretty big jump for me over my Rem 760 gamemaster in 308 which had trouble with 3" at 100. Because I don't handload yet, what ammo do you think I should be using for some unethical long range hunting 400-700 yards LOL. Thanks for any input. Also how can I make this great gun shoot even better?