Hi everyone,
Freshly back into shooting after a many-decade hiatus, and recently picked up a NEF Handi-rifle in .308 as my third rifle. It's the first break-action I've ever had, and I was trying out some different ammo, when I encountered an issue.
I was shooting OSA and Winchester, and found that the Winchester cases were not ejecting after firing, where the OSA was fine. I tried re-inserting the spent cartridges, and found the Winchesters were really tight, where the OSA was still a good fit.
I weighed the empty cases and noted that the Winchester brass was 10% lighter than the OSA. I did run a very accurate vernier caliper over the both but couldn't pick any
real difference in diameter.
I'm wondering if the lighter brass might have expanded more, causing the case to be difficult to extract, where the OSA retained a better shape.
I was wondering if anyone had experienced anything similar or have any ideas they might be able to share.
I have checked that the ejector and shelf are clean and dry, and a small tap with a cleaning rod ejected the Winchester cases cleanly. The OSA cases all ejected a good three or four metres away. So I think the ejector is fine and the action locks up really well.
Very much appreciated.
Cheers.