I just got back from the range, and learned that my new 270 vanguard likes the 145 eld-x bullets with h4831sc. My loads started at 56g, up to 59g. All were 1" or less groups.
56g - 2850 fps 1" group
57g - 2900 fps 3/4" group
58g - 2950 fps 1" group
59g - 3000 fps 1/2" group
I also compared factory "precision hunter" ammo which uses 145 eld-x bullets, with a published velocity of 2970 fps. My chronograph clocked them at 2925 fps. They shot a 1" group
