Mudbug
.410
Recently fired 25 rounds of 20 gr .17wsm through my Savage B-Mag. I had three ejector failures in the session. After removing the casings manually, I noticed these cracks in the neck and shoulder area. Very hot round at 3000 fps and I understand this is a relatively new cartridge. Should I just dismiss these as "growing pains" for the new cartridge? They were in random order and the rounds impacted nicely with the grouping.