85gr Nosler custom ammo questions

[tullfan]

Ok so I bought some expensive Nosler custom ammo for my .243. Partition projectile 85gr.
Tried them today and could not get three rounds on the same side of the target.
Thought it was me so I took the .270wsm and put 3 on top of each other. This is all happening at a hundred yards.
Back to the .243, same results flyers all over the place. It was like a shotgun.
So for laughs I tired the original ammo the rifle was sighted in with,Federal blue box 80gr. Lo and behold back to about an inch and a half high dead centre near one on top of another.
Back to the Nosler and 3 inches to the left, or low, or right. It was crazy.
Anyway, could it be the twist of the barrel? It's s savage 16 with the accustock and all. Its crazy accurate with the blue box federal as stated. Could 5gr make that big of a difference?
I have 23 rounds of the Nosler custom stuff left. I'll swap them for a box of Federal blue box in 80gr. I'm in Airdrie
Tullfan

[Smokinyotes]

Yup, just cause it's expensive doesn't mean your rifle will like it. I used to have a LH Remington 700 in 22-250 that shot 3/8" groups with the old gray box Winchester psp.