Slightest bit of tension on the bolt handle at close with factory Nosler 140gr Accubond.
Sammi spec throat, although I haven't seriously played in depth with it to find the lands since I am only 45ish rounds in and the rifle hasn't sped up. Once I break over the 100rd threshold or it speeds up, I will start seriously playing with loads. Still have 350ish of the factory Nosler 140gr Accubonds to use up and with the accuracy I am getting, I am in no hurry to set down and work up a load.