No need to go out and buy an inertial puller (though eventually they are a good tool to have around). Your "too-deep" loads won't be unsafe. They'll also probably shoot just the same as the rest, they will be far better than simply "blasting quality".
Nosler Ballistic Tips are wonderful bullets. They used to be a bit cheaper than match bullets, and were useful to use as "backups" to match bullets if you couldn't get match bullets. But then Nosler seemed to figure that out, and started packing them in boxes of 50 for nearly the same price as the older boxes of 100, so they now no longer have the virtue of being a bit cheaper. They're still awfully darn accurate though.
Re: seating die adjustment, set it up so that it is *not* crimping the case mouth. The RCBS instructions will tell you how (though I find that they are difficult to follow!).
When you trim your cases to length, it is nice if you can also chamfer the inside of the case mouth (so that it doesn't cut/shave the bullet when seating) and the outside of the case mouth (so that it feeds a bit more smoothly). Redding makes a nice "Cadillac" chamfering tool, the cheapy Lee one does just as good a job though it's not as pleasant to use.