i have a savage mark2 chambered in 17hm2, i love the gun but there is one major problem with it. about 5 out of 50 shots it will split the shell case and it gets stuck in the chamber. its easy to get out you just take a pocket knife and slip the blade under the rim and pop the casing out. i dont know what is wrong with it, been like this since i bought it new. like i said, not a big problem but it gets really annoying. what could be causing it?
There is a lot of information over on rimfirecentral on the 17hm2. There is some major debate on what causes this problem. Some of them are a dirty chamber (shouldn't be a problem on a bolt , bad lot of ammo (I shoot Eley now), one of the main problems seems to be if there is chamfer at the back of the chamber (this is a bad thing). Anyway there is lot's of information over there if you want to dig.
i've been thinkin about sellin it, i already have a 17hmr that gets more use. unless i drive an hour and a half i cant get ammo for the hm2 but everywhere around her has the hmr amma. i thought it was a bad lot of ammo too so i went out and bought a box of cci,eley,remington, federal, and hornady and it didnt change a thing. the eley only did it 5 times out of the box but its still unaceptable. so right now it is just a pretty conversation piece.
I have 2 semi autos, one is a 10/22 built with a Magnum Research barrel and the other a Volquartsen Custom. I had a live round stick half way in the chamber of the VQ when I was unloading it, it let the bolt go to rechamber it and BOOM. I had to dig metal out of my fingers and hand for a couple weeks. If I can dig up the photos I'll try to post them. Yours sounds like a head space problem or the chamfer at the back of the chamber it to big. This is based on what I've read. I've never had a problem with my HMRs and I've always shot Hornday ammo in them.
well, i finally made the drive for some ammo. bought 3 boxes of eley, a box of hornady, and a box of cci. went to my buddies for some shootin. 3 rounds out of the cci split after being fired. 11 out of the hornady split, and none out of 150 rounds of eley split. i switched from my bore snake to an actual cleaning kit which was a pain to find to fit down the .17 barrel and it cost me 60 bucks. im going to stick with the eley ammo and see if it continues down the road. it also held better groups with the eley ammo.
The chamber in the neck area may be a bit over standard specs. That would allow the neck to expand to a point where the cases splits. Neck splits will happen when a center fire case is reloaded a number of times, the brass gets hard when worked. The little rimfire brass may not have ben annealed in the neck area and is to hard to expand so they split, I have not had any split necks from various brands of 17 HM2 or 17 HMR ammo that have ben fired in my Cooper 57 M LVT rifles..
Just for a different point of view, I have experienced the same thing in my Marlin 917V w/ 17 HMRs.... so i started looking at my ammo. I found several ever so slightly split necks (at the case mouth) in my ammo boxes. So I started opening new boxes, and was finding some there too! I usually find one or two in every 500 that is split in the box... Hornady and CCI stuff is what I shoot.
"Alas, death is not so neat in the silent places" ~ Capstick