Also, magazine length will determine max OAL, if you're going to hunt with them.
My Rem. M7 will not take over 2.830" in the magazine. However, it has a short and tight chamber. Max to grooves with a Nosler Part. is 2.805", but I seat them to 2.795" for positive chambering and feeding. The Rem. 140gr CorLokt's touch at 2.830", but I too, seat them to 2.800", same a factory ammo. Oddly, the Sierra ProHunter and GameKing bullets will touch lands at 2.795" and are most accurate at 2.775"OAL, hence they are my "favorite". Besides the 139gr BTSP Hornady's. These due to short bearing surface can be run to ~150fps higher velocity by slighty higher powder charges and near equal accuracy.
Barnes recommends seating .050" off the grooves. If that will fit your magazine, use that. I use to "old method" of measuring a fired case with a dented case mouth and the bullet lightly seated by chambering it. Then measure OAL. You can/should coat the bullet with a magic marker to see the total length seated as extracting the "cartridge" can cause the bullet to be dislodged......
The recommendation by Barnes is due to "unyeilding" nature of "solid" alloy bullet causing pressures to be somewhat higher than that encountered by "conventional" cup and core bullets.....when seated to touch the lands.