I recently purchased some fired brass online. There was several pieces with these raised lines on shoulder and body of case. Tried to resize one just out of curiosity. It was not happening. Just wondering if anyone has seen this before and what could have this been fired through?
What was this fired through?
- Thread starter FroFro1
- Start date
Yeah some variant of an HK with fluted chamber.
Don't listen to people saying it can't be reloaded it loads fine.but like any semi auto brass it gets abused pretty good each firing.
Most likely ptr91 but could be real HK or a Spanish cetme.
Don't listen to people saying it can't be reloaded it loads fine.but like any semi auto brass it gets abused pretty good each firing.
Most likely ptr91 but could be real HK or a Spanish cetme.
As with any once fired brass who knows how large chamber was or poorly machined.
Could require small base die to size and most likely your number of firings with any once fired rifle brass of unknown will be very limited number of firings.
Could require small base die to size and most likely your number of firings with any once fired rifle brass of unknown will be very limited number of firings.
Never had that problem with fluted chamber rifles but like I said.its a crap shoot with any once fired brass.
I shoot it and reuse it no problem but it comes out of my rifle.ymmv
Good luck
I shoot alot of once fired brass in 5.56 ,45,9mm ,308 ,30-06 for garands .
Some of it just sucks and needs kulling like you did.ive had split necks on surplus military brass that was carefully sized to fit case gauges.some of it is garbage not annealed good from factory or fired in out of spec chamber
Sad thing I started annealing all my so called once fired rifle brass cause some of it you can only get one firing even after carefully sizing brass from all over the world .which it's tough to size 1000 brass of various manufacturers and not oversize most.lol
But no I normally fire 3-4 and toss them for the rifle stuff anyways.
Just blasting ammo.surplus cause I can ammo
Some of it just sucks and needs kulling like you did.ive had split necks on surplus military brass that was carefully sized to fit case gauges.some of it is garbage not annealed good from factory or fired in out of spec chamber
Sad thing I started annealing all my so called once fired rifle brass cause some of it you can only get one firing even after carefully sizing brass from all over the world .which it's tough to size 1000 brass of various manufacturers and not oversize most.lol
But no I normally fire 3-4 and toss them for the rifle stuff anyways.
Just blasting ammo.surplus cause I can ammo
Fluted chamber as others have said. Most full auto chambers are generous in dimensions to insure proper function, that's why they feel so tight in your die.
Bat Rastard
Gold $$ Contributor
How in the heck can you ream a fluted chamber?
Coyotefurharvester
Silver $$ Contributor
Hammer forged?
Hammer forgedwith the rifling.
Krogen
Gold $$ Contributor
So rifling is done >after< chambering?? I did not know that . . . .
Same time. Hammer forging beats the steel down on a mandrel to form the bore and rifling. Sometimes the chamber is included on the mandrel.
Hammer Forged Chamber...?
I've been looking at barrels for a couple of months now, and am trying to find out about different manufacturers. Specifically, I'm looking for barrels that have the chamber hammer forged along with the rifling. My research has not yielded much info: I read somewhere that Knight's hammer...
www.snipershide.com
"The HK hammer forging process includes the chamber. The barrel is manufactured complete with chamber in a single operation. To perform this the forging mandrel includes the chamber form behind the rifling mandrel. The bored and honed blank moves over this during the forging process to create the rifling and the mandrel is moved forward in the final stages so the hammers form the steel down onto the chamber form. The process creates a near perfect concentricity and angularity between the chamber and the rifling but this is a side effect not the base intent. At HK we choke the muzzle section of the barrel. When run as heat treated and chrome lined machine gun barrel the manufacturing process creates a grain flow that follows the chamber contour and the dimensioning of the bore extends the barrel life considerably (specifically when firing heavy jacket or AP type projectiles at high rates of fire). The manufacturing process to forge in the chamber does have its own complexity and the reduction of area of the bore required to allow the chamber to be included has advantages but also some disadvantages unless extreme care is taken.
Look to the barrel alloy and the heat treatment in preference to the manufacturing method.
Chamber flutes are not forged in due to the problems with extracting the mandrel from the finished barrel. Originally they were cut on a most wonderous machine that had lots of flailing steel parts and no guards whatsoever. Today they are EDM formed.
I would observe that the new steel barrels from Bartlein are an excellent option."
divingin
Gold $$ Contributor
That design is because of how the HK's (and others) work: The brass is still under pressure as extraction begins, so the flutes allow a bit of gas to get between the chamber wall and brass to prevent them locking together. It does make for ugly once+fired brass though.
Doc: Thanks for that post. Always wondered how they did it.
Doc: Thanks for that post. Always wondered how they did it.
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