VASCAR2
Ok short story long I got a new upper with the test brass. Brass shows radial marks to indicate reem chatter (pic) I also spec'ed the cases against SAAMI for fire form to chamber to get the number on the chamber there (pic) SAAMI calls for .4328 in that section of the case for chamber I am spec on brass .4275- .4280 that's a couple thou tight under SAAMI but consistent with brass fired from a different Grendel. I have to wait till Tue to get ahold of the builder due to the 4th. I am not a dumb guy but also not a chamber expert So I am just reaching out to more informed guys...(that's you) to make sure I give him the right info and i also get a proper barrel for my money. IMO the radial lines require barrel replacement.
Ok short story long I got a new upper with the test brass. Brass shows radial marks to indicate reem chatter (pic) I also spec'ed the cases against SAAMI for fire form to chamber to get the number on the chamber there (pic) SAAMI calls for .4328 in that section of the case for chamber I am spec on brass .4275- .4280 that's a couple thou tight under SAAMI but consistent with brass fired from a different Grendel. I have to wait till Tue to get ahold of the builder due to the 4th. I am not a dumb guy but also not a chamber expert So I am just reaching out to more informed guys...(that's you) to make sure I give him the right info and i also get a proper barrel for my money. IMO the radial lines require barrel replacement.