Get yourself a Hornady L-N-L AOL gauge and the modified case for your rifle and go from there, you can find the AOL that your rifle likes, and it'll shoot that much better..... As opposed to matching the AOL of a commercial made cartridge, by seating the bullet deeper.
Some commercial rounds shoot just fine, but there is alot of accuracy to be had by getting proper AOL for your specific rifle dude.
(most of what you'll find is that commercial round are seated deeper for magazine purposes, and such)