With factory ammo, mine always did real well with Federal Premium VItal Shok 150gr. The one's with the 150gr Nosler BT in it. They're a little pricey but were one hole / 3 shot accurate.

Next were the Remington 150 & 180 core lokt (I think) - the green & yellow box. Under 100yds they were OK.

Lots o luck with the new cannon.

Frank in Fla