Originally Posted by barnesuser28
just curios. what do you mean by getting the bolt bushed
I'll take a shot at this, & Jeff, if you had something different in mind feel free to correct me.
When experiencing cratered primers with even mild loads, it can usually be (at least partially) attributed to excess tolerances between the firing pin & the hole in your bolt where the pin protrudes to strike the primer. The primer material will flow into the excess space, thus creating the "cratering" effect. I experienced this on my 6-284 before installing a PTG bolt.... even mild loads would crater, frusterating but it did nothing to defeat accuracy or case life, purely cosmetic in my experience.
To remedy the situation, a competent 'smith will enlarge the firing pin hole in your bolt & install a bushing appropriately sized to the correct tolerances which should/will eliminate the excess space. If the primer material has nowhere to flow, it can't provide the "cratering" effect (with competent loading practices of course
Hope that helps.