You may well be right, but this rifle is going to be sold to a club member (I hope) when it's finished. And it will be used at all ranges with a sling as everyone tends to use them. So I have to set it up to shoot well with a sling. It doesn't need to be spectacular, just a solid, very good, reliable performer. Even an 8" group would keep them in the bull at 300m, but 6" would leave a little margin for shooter error.
Next week is at 100m, so I hope to have it sorted out when I test again then. I will report.