The couple I've shot safari's .270 and 30-06 have been very accurate. I don't know if the safaris change their receiver based upon cartridge length.
I was wondering if your scope was more of a problem than the gun hometheatreman...like maybe a loose mount or reticle?
It might be worth swapping out a scope or borrowing someone elses and seeing. It couldnt hurt to try.
I originally thought that was the problem too. I had a Leupold VX-I 3x9x40mm on there. I ended up thinking it was the problem so taking it off and checking all the mounts and rings. I then put a Burris Fullfield II on. I'm much happier with the scope but it still isn't the most accurate gun out there. I've asked several people I've seen with them for sale what kind of groups they get and most seem to say around 2" groups. I've seen posts on here saying they are very accurate as well as others posting saying they could never get theirs to group any better than mine.
Overall, it's a great gun and for hunting I'd recommend it. I just don't think it's the most accurate for target shooting. Some people seem to get great accuracy out of them and others are like me where only get marginal accuracy.
One other thing as already mentioned in this thread after 3 shots or so it really seems to have the barrel get hot then accuracy really gets bad. So I usually shoot one maybe 2 shots then let it cool down.
Here are groups I shot at 100 yards. Here is with the Federal Fusions in 150 grain. Out of the many types of ammo I've tried this has grouped the best for me but still not great.
Then for the Federal soft points which seem to be the next best this is the first 2 shots I shot.
Needless to say I was impressed. However, I couldn't do that much. Here is a four shot group with the Federal Soft Points.
Now I let it cool between shots so that wasn't the issue. I also had a friend come shoot it when I was having issues with it and he had the same experience I did. Only I was using Winchester Ballistic tips at that time which were all over the target.
For comparison here is a target I shot with my black powder gun at 100 yards. The first one to the left was at first. I adjusted the scope and shot the middle 3.
So that leads me to believe it's more the gun than just me.
Now I will say at 50 yards the BAR puts out great groups. I shot one ragged hole that was 6 shots. I couldn't figure out why I kept missing the target until I went up and looked and it was one big hole that you could tell all 6 shots had been through.