What is this? Any concerns?

Silvereagle50

Senior Member
Joined
Dec 14, 2018
Messages
386
Location
SE OK
This is factory Hornady Precision Hunter ammo. It only happens every now and then.
Seems that the bolt is a little contrary to close on a round and then bolt is hard to open and I see this on the head of the brass.

Any ideas on what’s causing this and should I shoot any more of these that are hard to bolt?
 

Attachments

TyrsTestament

Junior Member
Joined
Nov 8, 2019
Messages
12
This is factory Hornady Precision Hunter ammo. It only happens every now and then.
Seems that the bolt is a little contrary to close on a round and then bolt is hard to open and I see this on the head of the brass.

Any ideas on what’s causing this and should I shoot any more of these that are hard to bolt?
Kind of a blurry photo. 300 rum? Sounds like you are getting a small amount of pressure but not to to much to worry about (a better picture of case head and side would help). That little smeared bit is from your ejector plunger which is normal. Primer shows no pressure at all.

Sent from my Pixel 3 using Tapatalk
 
OP
Silvereagle50

Silvereagle50

Senior Member
Joined
Dec 14, 2018
Messages
386
Location
SE OK
It’s a Rem mod 7 in 300 Saum

I’ll try and get some better pics.


Sent from my iPhone using Tapatalk
 

LaHunter

Senior Member
Joined
Mar 9, 2013
Messages
811
Location
N.E. LA
Is the bolt hard to close with other ammo?
I would recommend finding out where the round is contacting the chamber, it could be the brass or it could be the bullet jamming into the rifling, which will cause a significant spike in pressure.
You are likely getting pressure, with the 'sticky bolt' after firing. Also, that mark on the head is not something that I would call 'normal'. I have never had that show up on my brass. I may be off, but I have read that mark could be an indicator of excessive pressure.

Get another brand of ammo and see if it does any better. After that, you may want to have the chamber dimensions checked by a gunsmith.
 
OP
Silvereagle50

Silvereagle50

Senior Member
Joined
Dec 14, 2018
Messages
386
Location
SE OK
Is the bolt hard to close with other ammo?
I would recommend finding out where the round is contacting the chamber, it could be the brass or it could be the bullet jamming into the rifling, which will cause a significant spike in pressure.
You are likely getting pressure, with the 'sticky bolt' after firing. Also, that mark on the head is not something that I would call 'normal'. I have never had that show up on my brass. I may be off, but I have read that mark could be an indicator of excessive pressure.

Get another brand of ammo and see if it does any better. After that, you may want to have the chamber dimensions checked by a gunsmith.
I don’t recall any. I’ve tried Nosler and HSM.

Looking closer, it only looks shiny. Doesn’t seem indented or anything like that.
I went out and looked at all my fired brass (some 25-30 rds) and only found one more that looked like that. Had maybe 2-3 more with lighter marks.


Sent from my iPad using Tapatalk
 

Cahunter805

Senior Member
Joined
Oct 8, 2012
Messages
958
That is an ejector mark. If it’s only a few rounds out of 30pcs it’s probably not an issue. Could be due to any number of factors including excessive headspace on new brass, slight overload from factory, even some dirt or oil in the chamber.
I would contact Hornady and see what they say. They may replace the remain ammo.
Also hornady brass can be a bit soft.
How did the Nosler and other brass look?
 

TyrsTestament

Junior Member
Joined
Nov 8, 2019
Messages
12
Here is a few more pics.
Pretty normal for the ejector plunger to smear the case head. It's not excessive either. The primer looks a little flat but again, not bad enough. Check your velocities too. That'll tell you all you need to know. Don't clean your chamber with oil, and keep your shot count to a minimum (3-6 depending on barrel) before letting barrel cool.

Sent from my Pixel 3 using Tapatalk
 
OP
Silvereagle50

Silvereagle50

Senior Member
Joined
Dec 14, 2018
Messages
386
Location
SE OK
the other brands of ammo all look normal to me.
I never shoot more than 3-6 rds before cooling. Its a mag barrel, so doesn’t heat up as fast as my thinner barrel rifles.
not that Hornady is new, but this Saum ammo by Hornady just came out. I may even be the first one that got this ammo when it came out. But surely they did their homework before putting it out????
 

cjl2010

Member
Joined
Jun 12, 2015
Messages
74
Pretty normal for the ejector plunger to smear the case head. It's not excessive either. The primer looks a little flat but again, not bad enough. Check your velocities too. That'll tell you all you need to know. Don't clean your chamber with oil, and keep your shot count to a minimum (3-6 depending on barrel) before letting barrel cool.

Sent from my Pixel 3 using Tapatalk
You are really gonna roll with ejector marks (especially smears) being normal?

ejector marks and flattened primers are a pretty good sign of over pressure.
 

TyrsTestament

Junior Member
Joined
Nov 8, 2019
Messages
12
You are really gonna roll with ejector marks (especially smears) being normal?

ejector marks and flattened primers are a pretty good sign of over pressure.
It is normal, see it all the time. ELDX in the 30 cal can be oversized a bit. Also, I didn't say it wasn't a sign of pressure. I had recommended he check his speed as it will tell you all you need to know.

Sent from my Pixel 3 using Tapatalk
 
OP
Silvereagle50

Silvereagle50

Senior Member
Joined
Dec 14, 2018
Messages
386
Location
SE OK
I didn’t have much time this evening with it getting dark so soon, so I didn’t get my chrony out. I’ll be sure and check that next time.

when I have used the chrony, I’ve been getting 2880-2930 Out of the Hornady PH.

Sent from my iPad using Tapatalk
 

cjl2010

Member
Joined
Jun 12, 2015
Messages
74
It is normal, see it all the time. ELDX in the 30 cal can be oversized a bit. Also, I didn't say it wasn't a sign of pressure. I had recommended he check his speed as it will tell you all you need to know.

Sent from my Pixel 3 using Tapatalk
You bet man. Good luck with that.
 
Top