ORIGINAL: Encorehunter
I would try some 165 grain rounds as well as corelockts. I have a 308 shortrac that will shoot sub MOA with Hornady 165 BTSP's. IT shoots about 1.5" groups with Remington 150 Grain Corelokts. Also, let somebody else shoot it and see how it performs. I wouldn't send it in yet.
I have some Core Lockts in 165 grain I've tried and they don't do well at all. I had bad experiences with Remington shells so I don't particularly like them and the gun didn't seem to like the 165 grain ones I tried at all.
I used to shoot 165 grain Winchester Soft Points but they got to be hard to find around here as they were always sold out. I never actually shot them trying to get a group though. Just got the scope close and hunted with it. I don't know how they grouped. I tried some 150 grain Winchester later and they did okay but not that great.
I shot the 150 grain Winchester Silvertips. Not the ballistics but the regular silvertips and it shot a hole at 50 yards like I said where it was just one big hole about 1" after 6 shots. I couldn't figure out how I was missing so I walked up there and it was a big hole and you could count where six bullets went through it. This was in a buddy's vise type thing like a lead sled. Not exactly but similar. It was also at 50 yards. He doesn't have a 100 yard target anymore as the wind blew the stand for the target down and it's also at an akward position so you couldn't use the vise if that's the word anyway.
I can't get these to group well at 100 yards shooting at our house. I had a buddy shoot it too. This was trying to use 150 grain Winchester Ballistic Silvertips and he had the same problem I did with them going everywhere. He put one dead center in the bulleye. Then one right there with it then 2 about 3-4" off. Well, I put one way off and he thought it was me so he shot and his was way off on up there with mine. That's when we thought the scope was bad. I think it may have been. So we changed that and got it to work better but still couldn't get decent groups. So that's when I tried several kinds of ammo. 150 grain Winchester Power Points, 165 Grain Remington Core Lockts, 150 grain Winchester Silvertips, 150 Grain Winchester Ballistic tips, 150 grain Federal Fusions, and now these 150 grain Federal soft points are what I've tried. I can't seem to find Hornady ammo anywhere anymore. 30-06 ammo in general is hard to find around here now.
My buddy was only there when using Winchester Ballistic Silvertips but he said he was wondering if something wasn't wrong with the gun. He is a better shot than me. Another buddy shot it and got groups about like I am with the Fusions whom is a excellent shot however, I'm not sure if he tried to get perfect groups or was just trying to get the scope set close for me. He told me it shot fine and close enough to kill deer so to just shoot it. His groups might have been just a tad bit smaller but still were not super tight.