Thread: .17HMR bolt gun splitting cases

I have had both Hornady and CCI with split necks after firing but there does not seem to be any problem with accuracy or damage to the rifle. I have decided it is what is is and get on with it.
Early yesterday morning I shot a possum out of a tree in the garden. It to ended up with a split neck.

Originally Posted by Shearer

I have had both Hornady and CCI with split necks after firing but there does not seem to be any problem with accuracy or damage to the rifle. I have decided it is what is is and get on with it.
Early yesterday morning I shot a possum out of a tree in the garden. It to ended up with a split neck.

Yes I have had a few split 17 HMR possums also. They tend to split all over the place, some even leaked gas!

CZ and new Weihrauch split the Weihrauch is using old ammo. The Anshultz and Sako didn't split cases?

Originally Posted by Maca49

CZ and new Weihrauch split the Weihrauch is using old ammo. The Anshultz and Sako didn't split cases?

Probably tighter neck dimensions in Sako and Anshultz?
Less room for the neck to expand?

Originally Posted by 300CALMAN

Yes I have had a few split 17 HMR possums also. They tend to split all over the place, some even leaked gas!

The one I shot last night with 30g Vmax didn't so much leak, as positively exploded....all over me

Slight change of track.... What ammo is Vail le for 17her, can only get 17gr have heard of 20gr F.M.J. But shop didn't have them in stock. Anyone know of anything heavier?

Pretty sure Hornady do a 20 vmax

@223nut

My mistake. Not a Vmax, but could be the ticket
Hornady Manufacturing Company :: Ammunition :: Rimfire :: 17 HMR :: 17 HMR® 20 gr HP XTP®

@Pengy that looks the ticket, now to try and find some next time I'm in town!

Originally Posted by Maca49

CZ and new Weihrauch split the Weihrauch is using old ammo. The Anshultz and Sako didn't split cases?

The rifle I'm getting splits with is a anshultz

Originally Posted by 223nut

@Pengy that looks the ticket, now to try and find some next time I'm in town!

I will look over this way for you

I tried some 20gr Hornady ammo. Didn't shoot as well in the Savage unfortunately. I think the 17hmr was designed for the 17 grain projectiles so your rifle may not like them?

Old ammo maybe the prob me thinks?

Originally Posted by Pengy

I will look over this way for you

I'm er on the island for summer so will ask around d Invercargill before I go into town next

Interesting thread re the splitting of 17 HMR cases. I had a Marlin 22 Mag for many years and never had a problem with it until one day I was checking the zero and noticed split shells. The brass would stick in the chamber and I had to dig it out with the point of a knife. I though it is a different caliber but the same type of problem. I think in this case it was a faulty batch of brass as it had never happened in the past with the ammo in question or other brands. The ammo was Winchester 40 gr HP in the grey box at the time. I have since sold the rifle but I shot thousands of rounds through it before that problem occurred.