Thank you for all the answers. Sadly the factory barrels are no longer in production, so no luck on that front.
Scope mount has been checked by putting both mount and scope on the .30-06 barrel and shooting a 5-round group which - albeit being 3" right and high - was under 1".
Drover, I can see how this caused confusion. The Vmax 40gr is the round with the best accuracy right now. The first three usually come out to 1 MOA or less, the 4th and/or 5th round will be way off around 2" or more.
The 69gr Remington was way worse, that looked like I shot the rounds out of a watering can.
From what I can gather the twist on the Blaser 223 barrels is 1:10.
I am also sure that I changed out the bolt head to Mini.
The only option I see right now is to clean the barrel chemically and see if it makes any difference. Right now the .30-06 barrel is sitting in it and shooting great with the 125gr Hornady Custom.
Would be a shame to just have a spare barrel around, though and I don't want to sucker some poor soul into buying it.
