I see a lot about this on social media pages. Has anyone experienced this? I wanted to come to the experts for the final answer.

I've not seen it with the Encore, but have with the Contender.

Good to hear that. I bought the Encore specifically for the ability to handle bigger cartridges.

I'd say frame stretch is not common with the Encore.

However, I do think it's entirely possible to stretch an Encore frame by running hot loads in the larger diameter cases (ie - belted magnums).

Even in the Encore, it's still limited compared to a bolt gun. That's one reason the Ultra Mags and WSM's are offered in the Encore.

MGM recalled all their barrels chambered in the WSM/Ultra Mag chamberings.

Best to stay with the '06 case head even on the Encore if you plan to push the pressure limits.