I'm going to go the other way on this one. My suggestion for you, is to go a whole new direction though. In pointed bullets, it's pretty much a toss up as to which is going to transfer more energy more rapidly, the 150 is moving faster, so it's going to expand faster, but the heavier bullet carries more energy per FPS, so it should typically do about the same damage as the 150 at those ranges (look at .45-70's, not very fast, but a lot of energy per FPS, so they still knock deer in the mud in a hurry). HOWEVER, there's the kicker, you're only shooting 100 yrds, so you don't necessarily need the long range accuracy potential of the pointed bullets. Here's when the big difference will play, get some round nosed bullets. In 180gr in .30-06, you're going to knock the heck out of a deer, and you're definately not going to have any problem with accuracy at only 100 yrds. I used round nosed for one year because I had permission on a really salty 80 yrd hunt, knocked the crap out of the three I got, it looked like the bullet knocked them over it hit so hard. I recovered one of the bullets from the far shoulder of a fat doe, looked like it was at least a half inch dia!! Surprisingly though, they don't to terrible amounts of shredding, unlike pointed bullets, and I've never had a round nosed bullet fragment extensively!!

Screw the 10 ring, keep them in the zero!!!