There are different stock fittings on different calibres, and different types of stock on the 452,
The HMR and WMR American are generally similar to the best of my knowledge.
My 452 WMR American stock was not the best fit and often ended up touching the barrel at the fore end.
These are quite easy to adjust with a little fettling, in my case I actually had to add a little wood back at the front of the action (completely invisible externally), the barrel is now dead straight in the stock, the gap totally even and the barrel FREE FLOATING.
A heck of a lot quicker/cheaper and easi