local CT has many, many boxes of .270, .243 and 30-06 for $33. I picked up their .308 win 165 accubond while it was at $41. The first and only 3 I fired from my savage 99 stuck in the chamber after firing. After being fired, the bottom of the casing was visibly larger than the top and unfired ammo. The gun cycled fine with unfired DT. I have never had an issue with any other ammo I have fed it before or since. My friend shot several rounds of the same box in his .308 Sako A7 and it worked very well though.
I'll see how the work in the x-bolt in the spring.