|
Joined: Nov 2012
Posts: 2,623
Campfire Regular
|
OP
Campfire Regular
Joined: Nov 2012
Posts: 2,623 |
So I'm hoping to know what the cause of this pucker/pinch in the shoulder. I was shooting at rock chucks Saturday and this case is the only one. I have heard it can happen if there's hydraulic pressure caused by too much oil left on the case after reloading. In fact have a friend that uses LW machine oil on his cases and doesn't really get them that clean after and this type of mark will show on some of his cases that I've seen. I've tried to tell him, but... Anyway I try to be very careful about my reloading, and I've never seen this until now on my cases. FWIW it's a 22-250, win brass, 3rd reload, and I don't load them hot. Thanks in advance.
|
|
|
|
Joined: Jun 2004
Posts: 44,832
Campfire 'Bwana
|
Campfire 'Bwana
Joined: Jun 2004
Posts: 44,832 |
That looks more like a defect fold that formed when the brass was made than it does a lube dent.
|
|
|
|
Joined: Nov 2012
Posts: 2,623
Campfire Regular
|
OP
Campfire Regular
Joined: Nov 2012
Posts: 2,623 |
OK...could it be less noticeable at first, but then more pronounced as you reload the brass? I will say that its not as deep or long as some of the dents I've seen that I believed to be caused by lube.
Also, reuse this brass or chuck it?
Thanks!
|
|
|
|
Joined: Nov 2011
Posts: 30,963
Campfire 'Bwana
|
Campfire 'Bwana
Joined: Nov 2011
Posts: 30,963 |
That looks more like a defect fold that formed when the brass was made than it does a lube dent. That was my first thought as well.
You didn't use logic or reason to get into this opinion, I cannot use logic or reason to get you out of it.
You cannot over estimate the unimportance of nearly everything. John Maxwell
|
|
|
|
Joined: May 2003
Posts: 10,430
Campfire Outfitter
|
Campfire Outfitter
Joined: May 2003
Posts: 10,430 |
I have some brute-forced cases for Fireball made from 223 brass, and I had some of "that" happen. So, that's probably a result of original forming, or a possible lube dent you missed when loading. Not a big deal as long as the bullet doesn't touch the dent when seated, in my experience, anyway. The crinkly shoulders don't affect accuracy to any degree, as long as the neck formed on center -- I trimmed and turned all the necks on the brute forced brass, including any possible "donut." The cases shoot fine even if they are kind of ugly. But the 22-250 has a bit of taper, and if you have to FL size them, that dent you have will move up into the shoulder/neck junction and might be an issue. It won't move much, but it will move -- by then, I would guess that the body of the case is showing the stretch at the base. So -- if you want, shoot and monitor. If not -- chuck it....it's just one case that doesn't meet your standards.
Up hills slow, Down hills fast Tonnage first and Safety last.
|
|
|
|
Joined: Aug 2003
Posts: 17,491
Campfire Ranger
|
Campfire Ranger
Joined: Aug 2003
Posts: 17,491 |
Did you clean soot off the area where it's dented, or was it squeaking clean as in the pic?
Sometimes, the air you 'let in'matters less than the air you 'let out'.
|
|
|
|
Joined: Mar 2006
Posts: 3,237
Campfire Tracker
|
Campfire Tracker
Joined: Mar 2006
Posts: 3,237 |
That looks more like a defect fold that formed when the brass was made than it does a lube dent. That was my first thought as well. I've got a couple of boxes of .270 WSM factory loads and the shoulders on about half the cases look worse than the one in the original post.
molɔ̀ːn labé skýla
|
|
|
|
Joined: Nov 2012
Posts: 2,623
Campfire Regular
|
OP
Campfire Regular
Joined: Nov 2012
Posts: 2,623 |
Did you clean soot off the area where it's dented, or was it squeaking clean as in the pic?
I believe I did wipe it off with a dry rag, but that was about it. I don't get a lot of soot seeping to the shoulder with this rifle. I had a 7-08 that was another story.
|
|
|
|
Joined: Aug 2003
Posts: 17,491
Campfire Ranger
|
Campfire Ranger
Joined: Aug 2003
Posts: 17,491 |
The reason I ask is that I have seen brass, usually well sooted in the neck/shoulder area, which I suspect didn't seal well right away so there was high pressure gas both inside the case as well as a very small amount outside the case around the shoulder. Obviously, if that high pressure gas is trapped even momentarily after the bullet exits the muzzle, the pressure inside the case can drop more rapidly while the high pressure gas is still trapped very briefly outside. Even a tiny volume of high pressure gas can increase greatly in volume and could cause a crease or dent like you see there. I would expect that there would be some soot thereabout however.
Last edited by Klikitarik; 04/21/15.
Sometimes, the air you 'let in'matters less than the air you 'let out'.
|
|
|
|
Joined: Nov 2012
Posts: 2,623
Campfire Regular
|
OP
Campfire Regular
Joined: Nov 2012
Posts: 2,623 |
Good point. Hadn't thought of that possible situation.
|
|
|
|
Joined: Feb 2010
Posts: 15,666
Campfire Ranger
|
Campfire Ranger
Joined: Feb 2010
Posts: 15,666 |
I have two cases that are factory new that look just like the one in the OP. One is a R-P 7 Mag and the other is a Winchester nickel .223.
NRA Life,Endowment,Patron or Benefactor since '72.
|
|
|
|
Joined: Feb 2005
Posts: 1,520
Campfire Regular
|
Campfire Regular
Joined: Feb 2005
Posts: 1,520 |
I have a couple pieces of RP 270 Win brass that I have reformed to 256 Newton that have a very similar dent in the same location. I believe that my dents were caused by too much lube.
|
|
|
|
Joined: Jan 2005
Posts: 22,884
Campfire Ranger
|
Campfire Ranger
Joined: Jan 2005
Posts: 22,884 |
I'd throw it away if it were mine.
|
|
|
|
Joined: Nov 2011
Posts: 30,963
Campfire 'Bwana
|
Campfire 'Bwana
Joined: Nov 2011
Posts: 30,963 |
I'd throw it away if it were mine. The defect is small enough I wouldn't toss it. It the fold went all the way through the brass, that would be different.
You didn't use logic or reason to get into this opinion, I cannot use logic or reason to get you out of it.
You cannot over estimate the unimportance of nearly everything. John Maxwell
|
|
|
|
637 members (10Glocks, 1badf350, 160user, 007FJ, 10gaugemag, 1936M71, 61 invisible),
2,390
guests, and
1,317
robots. |
Key:
Admin,
Global Mod,
Mod
|
|
Forums81
Topics1,191,832
Posts18,477,994
Members73,948
|
Most Online11,491 Jul 7th, 2023
|
|
|
|