I like much closer to .090 at the chamber.....I'll go as thin as .020 or so near the muzzle.....everyone has thier own comfort level. My view is that most of the pressure happens closer to the breech (and that is also the place I put my fingers, and that up front it is much less a worry. Of course if I'm buying......you know the deal. Be safe and use low pressure loads and have a good barrel man check them before purchase.
Steve