Quick bit of feedback regarding which ammunition works best through my 30-06 Howa Lighting - I just got it and needed to figure out which factory ammo worked best through it.
Over the last couple of weeks I've been using various different bullet weights and manufacturers and the top four are:
1st Place - 150GR Winchester Supreme Ballistic Silvertip
2nd Place - 150GR Winchester Super X Power Point
3rd Place - 180GR Sako Super Hammerhead
4th Place - 150GR Federal Power-Shok
I fired all at 25m and 100m at static targets using bench-resting and bi-pods and measured the resulting groups to arrive at the above results - I hope this helps if you have one yourself!