- Messages
- 9,364
- Reactions
- 23,647
following on from my report from a few months ago, after examining SIX damaged rifles. I post this from another UK-based forum on which I write - the person writing it is not me, nor anybody I know, except from the forum -
Quote -
A friend has a CZ 17 HMR.
He shot one pigeon and then shot at a magpie.
On the second shot he had a breech explosion.
The chambered round burst at the rim and the downward blast ignited the remaining round in the magazine. The bullet from the chambered round was an inch from the muzzle.
Damage to the rifle was limited to some distortion of the magazine by the blast of the igniting round and the trigger guard plate bent slightly. No injury to the firer.
As he had two boxes of 17 ammunition in the cabinet he is unsure which batch the round came from however the rounds were Hornady and the batch numbers are F04S05 and F28N15.
He has a bandaged hand from an operation and thought he might not have fully closed the bolt down however if the bolt handle is too far up the gun will not fire and to be able to fire with the handle slightly lifted would only move the bolt back by approx. 0.006".
Looking at the round that burst the rim has exploded, not any portion of the straight wall so I am of the opinion that this did not contribute to the problem.
Most likely causes would be an excessive charge in the round or a very weak rim.
He hunts with the HMR and the ammo batches are likely to be older as usage is fairly low.
Pictures are below.
Given the likely age of the ammo I am uncertain as to whether to report this to Edgar Brothers who distribute Hornady [in UK]. Your opinions please.
Burst rim of chambered round side on:
Burst rim from the rear:
Remains of round from the chamber:
ost
End quote.
tac
Quote -
A friend has a CZ 17 HMR.
He shot one pigeon and then shot at a magpie.
On the second shot he had a breech explosion.
The chambered round burst at the rim and the downward blast ignited the remaining round in the magazine. The bullet from the chambered round was an inch from the muzzle.
Damage to the rifle was limited to some distortion of the magazine by the blast of the igniting round and the trigger guard plate bent slightly. No injury to the firer.
As he had two boxes of 17 ammunition in the cabinet he is unsure which batch the round came from however the rounds were Hornady and the batch numbers are F04S05 and F28N15.
He has a bandaged hand from an operation and thought he might not have fully closed the bolt down however if the bolt handle is too far up the gun will not fire and to be able to fire with the handle slightly lifted would only move the bolt back by approx. 0.006".
Looking at the round that burst the rim has exploded, not any portion of the straight wall so I am of the opinion that this did not contribute to the problem.
Most likely causes would be an excessive charge in the round or a very weak rim.
He hunts with the HMR and the ammo batches are likely to be older as usage is fairly low.
Pictures are below.
Given the likely age of the ammo I am uncertain as to whether to report this to Edgar Brothers who distribute Hornady [in UK]. Your opinions please.
Burst rim of chambered round side on:
Burst rim from the rear:
Remains of round from the chamber:
ost
End quote.
tac
