224 valkyrie

Im looking for a smith can measure a chamber on an AR barrel and inspect entire barrel. Maybe cast the chamber. Measure it. I’m able do it but I can’t. I need independent exam. The chamber seems oversized to me. The fluting appears too deep. I think the neck may be over SAAMI spec. The finish...

Can the 5.56 NATO be loaded to match the Valkyrie with longer bullets (90g), or will that be over the AR COL limit? Could it be done in any factory bolt actions, or would it be a complete custom job? EDIT: Wasn't the whole point of the NATO change to fast twist barrels to shoot heavier...

Hello guys first post here, does anyone have any experience with the 224 valkyrie, as I'm looking into building an upper, but am having doubts on being able to get good seating depth etc. when using an AR platform. Any info would be appreciated. Thanks.