Luck is on my side this time. Sorting out this rifle will be handled by the other fellow. I did shoot a different Talkeetna a while back, and although it did not get top marks (aggregate groups somewhere around 2") it was not as wild as this one.
As a point of reference the two .375 rifles that I use now both agg. somewhere just slightly over 1 inch (not quite "internet accuracy" - but quite good) with several different loads.