I had a western hunter x bolt in 270 win and it fed just fine. I actually really like the x bolt mags despite my dislike for polymer magazines (subjective dislike, usually). I liked the magazines so much I put together a 308 that used x bolt mags. They both fed fine, stayed put in the rifle, came out with ease, could be too loaded through the action and we're decently long to allow for seating bullets further out than other mags which, if you're a reloader you will very much appreciate.
The rifle itself was awesome, light, accurate, smooth, effectively a 3 position safety and a 60° bolt through. I actually like a tang safety too. I'd buy another for sure.