I have an old savage mark ii my dad gave me years ago.

This summer I sighted in with new Winchester subsonic (1065fps) ammo before squirrel season. Trying to save some of the hearing I still have. Started having issues getting it to eject the spent brass. I looked the brass over for a potential burr in the chamber but found nothing. I watched some YouTube videos and disassembled the bolt. Mercy was it all due for a cleaning! After cleaning I was still having the same issues. Every other spent casing failed to be extracted with the subsonic ammo.

Today I shot 25 rounds of some new Winchester ammo (1280fps) and it worked flawlessly. This may make sense on a semi auto rifle. My question is why is this happening with a bolt action rifle?

For now I’m sticking with new ammo. Let me know if you have any ideas.

Thanks!
Luke