Dave, my 243 shooting an 85 grain bullet @ roughly 2900 fps is about 1 inch low at 25 and hits zero at 100 if that helps. I use fairly low rings. One inch low at 25 yards will put you close at 100.
I can still aim right on at 150 (just a bit low), but think I'm hitting 3 or four inches low at 200 the few times I've shot my coyotes sillouettes that far.
So the 100 yard zero will be good if you shoot close. If you do plan on big shooting, I'd scope up and zero as folks have outlined above.
