It shoots great from a sandbag but the grouping was not so good shooting prone with a sling.  Thanks for the info, that's what I'm looking for.  I have a gunsmith who builds match M1s and 1903s that are legal for different matches but nothing for the Krag.  I'm not going to get too crazy with this one but it really bugs me that the sporter with the original barrel groups so much tighter than the rifle with a new Criterion barrel.