scREWtop
I have used the Blaser Rifle in both real wood, and the synthetic version [my synthetic stock is black not the "Timber" model]. I have used 4 different bbls, including the 375. I have shot some of my friends Blasers including another 375 and a 416. I have nothing but praise for the rifle system. You can change bbls and not loose your zero. You can also take the scope on/off and it will remain in zero. I have never had any problems of any kind. All the bbls I have shot have been very accurate.
Hope this helps.