I had one years ago and it was 100% OK. I gave it up because of the expense of Weatherby brass (made by Norma) and the fact I could not see anything it did any better then my 7MM Rem mag.
But when I had it, I fed it a pretty steady diet of 175 grain bullets and I have nothing bad to say about it, for accuracy or game killing ability.
I sold the rifle because I just like the looks of other more classic rifles better. But the MK5 is a super strong and smooth action. I shot it to some very long distances on paper targets with zero complaints . We had a 1/2 mile range where I used to shoot back then.
If the 1-10" twist was bad in any way I am fairly sure I would have seen it at 880 yards. I didn't see ANYTHING to complain about.
