"...so a Hornady 100 grain spire point should..." Yep. You will have to work up the load though. Like I say, I changed the stock, long ago. Got the walnut Win 70A stock really cheap and glass bedded it and black phosphated the steel. I was working in a gun shop at the time so my costs were very low. Cost me $20 for the stock, the finish cost me nothing and sold the original stock for $10, as I recall. (Stuff was a great deal cheaper in the late 70's. Pay scales were much lower too. Got paid $6.25 per hour in the shop.) The accuracy after all that is consistent, but tacks are safe.
The rifle is really pretty and consistent accuracy isn't a bad thing. It gives me about 2-3" groups with Speer 105 SP's and 90 grain FMJ's(saw a red fox long ago that didn't know I was there. Had 75 grain HP's loaded and didn't know there was no season for fox then. Very long ago. Didn't want to blow the hide up either.) Worked up the 90 grain load and haven't seen a fox since. Haven't worked very hard at it either. The 90 grain fmj's are made for hide hunting. They're dandy for winter coyotes.
In any case, work up a load with your 100 grain bullets and use the same load for varmints(except coyotes if you want the hides. Trust me. A 105 SP practically turns a groung hog inside out. Coyote hide hunting bullets they ain't and neither is a 100 grain bullet). Varmint hunting is fabulous practice for deer/black bear season and the gound hogs won't care.
If you take it into your head to change the stock too, use only a Win 70A stock. If you can find one. The only thing I had to do was open the recoil lug slot backwards about 1/8". The rest of the stock fit without a whole bunch of modifications. Can't say I'd ever do it again though.