Oh, I almost forgot, Lapua has thicker brass than the Remington brass, so if you have a custom barrel made be sure to have it reamed for the Remington brass. The Lapua brass is spendy and not as readily available as the Remington brass for this cartridge. Also, the 140 grain Berger hybrids are longer bullet than most detachable magazines can accommodate. I, for example had to remove that 0.100" thick plate inside my AI magazines to fit the Berger 140 grain hybrid and the Surgeon brand receiver I use in this rifle is relieved for the longer bullets by the factory. You may have to modify for magazines and have the receiver of your rifle relieved to accommodate these longer Berger bullets if you wish to use them.