Guy, I have a CZ 458 Lott with the factory issued B&C stock. I bought the rifle used, and have put very few rounds down range with it. But, I have not read nor heard of issues with the stock.
With the full length aluminum bedding block stocks, I doubt their would be recoil related issues, if the recoil lug fit is proper.
I had a M70 (newer FN production) take-off stock fit and bedded to a M70 Classic 300 WBY. I have not shot it, but expect no issues.
The CZ and M70 stocks influenced me to put a couple of more B&C stocks on a couple of M70 Classic WSM’s.
All these particular stocks have the full length aluminum bedding blocks. I do not know about the ones without it.
I still see the Bell and Carlson sporter stocks available for the mausers and interarms mark x, Zastava . I just picked done up for a CZ in 458 Lott. It works well on it.
The B&C stock was strong enough for the 458 Lott? Did you reinforce it in any way with the bedding? Maybe a crossbolt or something?
Just curious. I've got a 30-06 in a B&C stock and have thought about converting it to a larger, more powerful chambering but wasn't sure the stock was up to the task.
Thanks, Guy
