potential issue with hornady hornet ammo

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kward

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went to the range to see how my newly acquired savage model 25 in 22 hornet would group.was shooting off a bipod with a rear bag.i had braught some 40 gr sierra reloads,25 gr factory v max ammo and some ppu factory ammo.grouping was horrible for all 3 types of ammo.the Hornady however had bulged cases.the primers also backed out a bit.no extraction problems whatsoever.anybody ever see this before
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Bulged cases on Hornet ammo is more common than not... Americans make the Hornet brass considerably under size for some reason...
 
Popped primers could be a sign of excessive headspace or an over pressure situation. If this was a used rifle try cleaning the bore several times, waiting for solvents to take affect before brushing and try again. If it happens again check headspace. If this was new, than contact the manufacturer, they may have something to say.
 
Pushed out primers on a rimmed case are a headspace situation, not really an over pressure problem...
 
guntech said:
Pushed out primers on a rimmed case are a headspace situation, not really an over pressure problem...
Click to expand...

The problem could still be both, or neither. There are several things that could cause primers to pop, drop, pierce, etc. The point is that a popped primer is not usually normal and signifies a problem. More likely related to the firearm than the ammo.

I was just offering the easiest/cheapest solution to check first. I've had .50 McMillian's rupture cartridge cases and pop primers because of overly copper fouled barrels. Centerfire or rimfire, excessive bore pressure caused by friction of the projectile and fouling can cause issues.
 
The Hornet is a temperamental cartridge to load for I've had two and sold both one a nice Sako. H-110/Win 296 either 4227 Gone but great Win 680 powders.A lot of European and early Hornets needed .223 dia bullets not .224 and had a 1-16 twist.First one was made on a rechambered .22LR barrel.2225 dia
 
I always thought a popped primer was one that had been fired.

If a popped primer is one that protrudes after you have fired the case, and that case is a rimmed case... the rim has been manufactured too thin or the chamber has been head spaced too deep. Those are the only two causes... not pressure and not several.
 
guntech said:
I always thought a popped primer was one that had been fired.

If a popped primer is one that protrudes after you have fired the case, and that case is a rimmed case... the rim has been manufactured too thin or the chamber has been head spaced too deep. Those are the only two causes... not pressure and not several.
Click to expand...

I have to agree with Guntec on this one!
 
guntech said:
I always thought a popped primer was one that had been fired.

If a popped primer is one that protrudes after you have fired the case, and that case is a rimmed case... the rim has been manufactured too thin or the chamber has been head spaced too deep. Those are the only two causes... not pressure and not several.
Click to expand...
It has been my experience in reloading the Hornet, the 30-30, and the .303 Brit that guntech is correct!
All too often shooters assume that all brass is the same and the firearm is at fault when undersize brass is the root cause.
 
Easiest solution is to punch that rifle out to K hornet and headspace on the shoulder ����������
 
guntech said:
I always thought a popped primer was one that had been fired.

If a popped primer is one that protrudes after you have fired the case, and that case is a rimmed case... the rim has been manufactured too thin or the chamber has been head spaced too deep. Those are the only two causes... not pressure and not several.
Click to expand...

A question (probably not entirely pertinent as assume poi would be vastly different)

Could low pressure cause this in a rimmed case ?
If the brass expands enough to grab the chamber but there isn't enough pressure to move the case back ?
Reason I ask is I've seen it with some 223 gallery loads but of course that is not a rimmed cartridge.
 
I have some Hornady 17 hornet factory ammo that forms the ring after firing. If you do any research on it there is a lot of claims for a bad batch of brass. I would imagine Hornady would use the same brass and form 17hornet and 22hornet??
Joe
 
flange said:
A question (probably not entirely pertinent as assume poi would be vastly different)

Could low pressure cause this in a rimmed case ?
If the brass expands enough to grab the chamber but there isn't enough pressure to move the case back ?
Reason I ask is I've seen it with some 223 gallery loads but of course that is not a rimmed cartridge.
Click to expand...

Low pressure in a rimmed or rimless case can allow a primer to protrude if the chamber headspace is excessive or if the cartridge has excessive head clearance or a combination of both.
 
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