Well finally got around to making up some fire forming loads for the .280AI and thinking about Muirs advice so decided to follow it and seat the bullet out to actually touch the rifling. 20 rounds were prepared using a charge of 55.0 Grains of H4381 and CCI 250 primers. The initial test firing was done once again at 60m and bearing in mind that the stock is not properly bedded as yet the grouping was surprisingly good in fact perfectly good enough for stalking use.
I suppose I should now finish the bedding of this stock at least until I can afford to get the new one.
Oh yes for this little test a vintage Weaver K4W scope was used. For those not familar with these old scopes it's 4x magnification with an objective of about 38mm and a wide view occular.