Does not perform well in a weatherby .270 win. not sure why.. - Nosler .270 Winchester Partition 130 grain Brass Cased Rifle Ammunition

After 2 trips to the shooting range, about 10 hours, and about 50 spent rounds of this ammo, I have to say it is not for a Weatherby Vanguard at all. The variance is about 4 inches at 100 yds! When I use the Hornady 130 grain BTSP I get a 1.25 inch variance. I wish I knew why this was happening, but I will try this ammo in a Browning X-mark Hunter and see what happens... Report to come later...