Wogpotter is spot on!!
I have chronied several loads from reloading manuals and seldom get exactly what they say. Most manuals use 24" or 26" barrels for rifle loads. Also I like to load bullets about 15 thousandths off the lands & grooves while the manuals usually call for deeper seated bullets to be sure they work in most rifles of that caliber.
Shop around and look for sales at all the ammo/reloading suppliers and you can usually find them reasonably priced.