Don't measure off the tip of the bullets, buy an ogive gauge. Hornady makes them and Davidson makes them available from
www.sinclairintl.com
I use a split neck case cut with a very thin dremel cut off wheel. Insert the bullet in the case, close the bolt, the bullet engages the lands and gets pushed back. There is a learning curve involved because if you leave the bullet sticking out too far, the lands will grab the bullet and pull it out of the case. With a little trial and error, you will be able to duplicate the OAL to the lands to the .001 consistently.
Hornady makes another tool where the bullet is inserted in a case and the bullet is pushed up till it contacts the lands, but I can not get readings that repeat to the .001 every time with that tool. Everyone is different and many, many people use this tool, I just can't get it as accurate as I can get with the split neck case method.
Learning to measure your OAL to the lands is paramount to achieving small groups as most rifles may have a very sweet spot that they like for best accuracy.
The 22/250 is very forgiving and a great case to begin reloading on. As a general rule, all the Remingtons that I have ever owned liked the bullets seated just barely off the lands, say .005 is a great place to start. I work up my loads at that seating depth, then start altering my seating dept in .005 increments, going in and backing off. I only shoot 3 shot groups because I am looking for 3/8" or smaller groups.
Then after I have got the load and seating depth dialed in, I will try altering primers which make a HUGE difference:
9 1/2
cci 200
Fed 210 have all given about the same results, rule of thumb only
CCI 250 is a radically different primer than the above
Winchester standard primer is also very different from the above primers, but Win primers are a tad larger than the other primers so I save these primers till the primer pockets get a tad bit larger, then go to Winchester and usually have to alter the load a tad because the primer is so very different. If you start off with Winchester primers, then the pockets are opened up a tad and may feel a little loose with other primers.
All this sounds like a lot of bother, but this method has produced excellent results(sub 3/8") for a lot of advanced reloaders that shoot long range and benchrest competition alike.