Like many I use the web to get info on reloading. However notice that the Lyman reloading guide is unique in that it gives reloads for every powder manufacturer.... Also give user info of the best powder for the bullet listed that was the most accurate...I know that they use one of those Universal type guns to check velocities and groups etc..However that good since they do not pinpoint a certain gun like many of the other reloading web links or even bullet reloading or powder company books pinpoint.
I do have an older Lyman reloading book...However so many new powders and of course the old book had nothing on the 17 Fireball...
Anyway if you want to buy a reloading book....The Lyman reloading guide just might be a good purchase....