Don't get all spun out worrying about squeezing every last fraction of an inch out of your factory ammo. I would suggest that if the rifle will shoot something like Federal Premium 160gr Nosler Partitions into 1.5" then you can call it good to go. Better to use a well constructed bullet and sacrifice a quarter of an inch of accuracy at 100 yards than to hunt out the best shooting bullet that might be less capable. Not every moose stands at 100 yards perfectly broadside waiting to have a bullet stuffed behind his shoulders. You may have to take a slightly quartering shot or you may pull the shot a bit and have to break a shoulder. Better bullets will always penetrate, but the opposite is not always the case.
Now, before the mob tries to lynch me for breaking the gun nut rule that ultimate accuracy is always the goal, I tailor my comments to people like the OP who (and I don't mean any offense) ask very basic questions and are looking for very basic advice. Guys that are new to hunting won't be trying to dummy Bullwinkle at 350 yards (hopefully) and can get by with a rifle that shoots into 1.5" or 2" at 100 yards whereas guy that have been at it a while would smack me in the mouth for such heresy. Now in a couple of years he will be back asking handloading tips that he can use to tighten up his groups or what bullet would be better for pronghorn. That's another conversation altogether. But for today I think my advice stands as sufficient.
