shot brass engaging lands??

[ileso]

Hi,
I usually shoot PPU through my 270win BRNO ZKK. But on my last outing after wild boar I changed to RWS.
After picking up my shot brass I noticed strange markings on the casing neck. They look like the beginning of the lands, but my understanding is the lands should be quite a bit forward of the neck and only slightly engage the bullet.

Can anyone with experience in gunsmithing explain what I am seeing? The primer also shows signs of slight overpressure (slight cratering) contrary to the PPU I usually shoot.

cheers

 

[finnbear270]

Looks like the rifling to me, have you compared the previous brass for neck length?

 

[Colonel]

Could that be the factory crimp?

 

[takbok]

Looks like bullet crimp to me.

 

[Rory]

First thought is crimp, but compare with unfired rounds to confirm if they also display these markings.

 

[finnbear270]

How much effort to chamber them?

 

[Steff]

It is the factory crimp. Not the first time I‘ve seen this.
As for the cratering, RWS is known to have some pretty stout loads. No wonder it is hard to replicate the performance of RWS ammo as a reloadet.

 

[finnbear270]

Steff , any reason RWS have done this intermittently? ....... I have lots of RWS brass in .270 ...... nothing like that in my stuff.

 

[ileso]

Looks like the rifling to me, have you compared the previous brass for neck length?

all previous brass (PPU) are normal, theres no stretching.. no signs of rifling on any previously spent casings

 

[ileso]

Could that be the factory crimp?

I rechecked the RWS casings.. i can now see the crimps..!

 

[Steff]

Steff , any reason RWS have done this intermittently? ....... I have lots of RWS brass in .270 ...... nothing like that in my stuff.

No idea, I‘m afraid. But it is a common picture to me.

 

[ileso]

It is the factory crimp. Not the first time I‘ve seen this.
As for the cratering, RWS is known to have some pretty stout loads. No wonder it is hard to replicate the performance of RWS ammo as a reloadet.

thanks, your answer made me recheck the unshot cartridges.. I can barely make out the crimp but they are there. I guess they are more visible after shooting especially with the carbon.. was definitely new for me.
as for the cratering. yes, all cases show the same cratering so I guess its normal

 

[Steff]

thanks, your answer made me recheck the unshot cartridges.. I can barely make out the crimp but they are there. I guess they are more visible after shooting especially with the carbon.. was definitely new for me.
as for the cratering. yes, all cases show the same cratering so I guess its normal

Glad to have helped.
But to cratering may be a sign of a slightly large firing pin hole in the bolt face.
Probably nothing to worry about but maybe worth a check next time you visit your gun smith.

 

[Muir]

Glad to have helped.
But to cratering may be a sign of a slightly large firing pin hole in the bolt face.
Probably nothing to worry about but maybe worth a check next time you visit your gun smith.

If they crater with all primers it's a problem. If just with the RWS ammo, it's their primers.
If that was rifling, the rifle would have exploded.

By the way. I thought RWS was quality ammunition!! If so, why would they apply a worthless, accuracy inhibiting CRIMP to the loaded ammo?? What were they thinking! Makes you wonder. ~Muir

 

[User00044]

If they crater with all primers it's a problem. If just with the RWS ammo, it's their primers.
If that was rifling, the rifle would have exploded.

By the way. I thought RWS was quality ammunition!! If so, why would they apply a worthless, accuracy inhibiting CRIMP to the loaded ammo?? What were they thinking! Makes you wonder. ~Muir

Mmm !

CRIMP - a vague attempt to polish a terd and hide inadequacies !

I got that definition from the Oxford English Dictionary ( no , I really did ).

 

[finnbear270]

Like I mentioned, zero anything like that on any of hundreds of RWS here.

 

[kenbro]

Mmm !

CRIMP - a vague attempt to polish a terd and hide inadequacies !

I got that definition from the Oxford English Dictionary ( no , I really did ).

Did the Dictionary spell it wrong too?
K.
Ken.

 

[cjm1066]

If that was from the rifling, the rounds would be hard to chamber.

 

[finnbear270]

If that was from the rifling, the rounds would be hard to chamber.

Hence my post #6

 

[webley701]

Like I mentioned, zero anything like that on any of hundreds of RWS here.

Conversely I’ve got hundreds (literally) of RWS & GECO cases which I’ve fired as new factory rounds which had a slight crimp & display these marks.

The LEE ‘FCD’ dies apply the same type of crimp which results in the same slight marks.

The marks are not related to the rifling.