Well i don t know the OP but i own 3 tikkas and sold a fourth. My 6.5 swede is a solid half moa gun with factory nosler 140 ABs. I have shot 1 inch 3 round groups at 300 and shoot clays at to 400 with a high hit ratio. I have a bushnell 3200 3-9x40 mounted. I think witth more magnification and my hand loads I could pull off 3 inch groups at 500. My 223 T3 and 308 tikka tactical are both sub moa but they dont touch that Swede.

Take it for what its worth. I dont shoot past 400 very often but I believe a stock tikka with a better scope and ammo is possible lf a 2 inch group at 500.