Just test-fired 3 new barrels on my new Mauser 98 go-to bolt rifles. 30-06 and 300 win mag, zero issues with fired brass. On the 375 Ruger, a super-thin shiny line on the upper case about 3/4 from the shoulder and a slight bulge at the base of the case. Fired primers look normal with no issues. For whatever reason, I can't upload pics here today to show it.
This is new factory Hornady 270 grain ammo, not handloads. Both fired cases look alike. I have seen slight bulging at the base on fired cases before on some hot handloads, but not factory loads. No clue what the shiny thin line at the upper part of the case is, but it is not inside the case and you can just barely feel it trying really hard with your fingernail.
The chamber looks like a chamber should look on a new custom barrel and nothing I can see that would cause that line.
Is this something I should worry about?
Also, to my amazement, the 300 win Mag with a 180 grain bullet clearly had more felt recoil than the 375. I fired twice, side by side, it is not my imagination.
Last edited by FSJeeper; 07/21/21.
