So, I went to my local range on Friday with my Marlin 60 and a bunch of ammunition of various kinds. The Marlin's been giving me good service for a couple years now (was my first gun!), and where it used to be jam-o-matic, it now is very reliable... that is, until Friday.
I'd gone through about 75 rounds of Wolf match target, when I decided it was too precise, and I wanted to try some other ammo. First, I loaded up and fired 10 CCI SGBs (from my special stash), then switched over to some CCI CB longs. These all worked great, though the longs required manual cycling.
Then I loaded up a tube of (14) Aguila SE 40 grain subsonics. The first 11 rounds sporadically cycled the action, but the 12th shot loaded automatically. When I squeezed the trigger, a very loud bang occurred, and smoke started streaming out of the action and the stock. I also noticed that my cheek and glasses had been struck by something (but nothing great)
I called over the range officer, who opened the action, and with a cleaning rod, rammed out the cartridge case and showed it to another range officer, who took it inside to show the gunsmith. About this time I looked inside and noticed that the bullet was also sitting in the action, so I took that out.
The owner came out, mumbled something about the bolt, then told the second range officer to try another shot on an isolated lane, since he wanted to get a look at the casing. So, he fires, and nothing abnormal happens, except that the casing jams in the action. So he shakes it out, and we both agree that nothing looks out of place. Then we take it into the shop, the owner looks at it, and says that the face of the casing is slightly domed. Compared to casings from earlier that day, it is actually ever-so-slightly domed.
The owner then says that I'm done with that rifle for the day, so I go back to chastising my friend about his stock 10/22's groups, then head home.
Here's the casing from the Aguila.. the Wolf casing has doming that's hard to capture on film.
So, does anyone have any idea what happened and if it's safe to shoot again? My feeling is that the first round was out of battery from a weak action cycle, but I have no explaination for the doming on the Wolf round.
If anyone needs more pictures or explaination, I can post the stuff here.
Thanks