I really enjoy reloading for and shooting my 6.5 Grendel and all the support I have received from all in this group forum. I have a problem thought that I hope someone can provide me with direction.
I have had inconsistencies with the barrel I bought here in the Group Buy a while back. I broke down and bought a bore scope to see what's going on inside and I came across the following.
[ATTACH=CONFIG]18350[/ATTACH]
I had a little luck moving it with a cleaning rod, but it is a relatively thick shaving that won't come off. Any hope to easily fix this?
11-09-2021, 01:24 PM (This post was last modified: 11-09-2021, 01:35 PM by Hollis.)
LR1955 Wrote:Hollis:
When you run a rod down the barrel without anything on it, does the end of the rod stop when it hits that thing?
I figure that if it does stop then it is more than a shaving and the barrel needs to be replaced.
If it were only a shaving, you would have flattened it out or shot it out by now.
LR-55
No. It is in there really good. I can move and bend it with cleaning rod, but it is not coming out. It is part of the rifling cutting that did not fully cut out.
Hollis Wrote:No. It is in there really good. I can move and bend it with cleaning rod, but it is not coming out. It is part of the rifling cutting that did not fully cut out.
Send it back, that is not acceptable...I had a new BCM HFB barrel that had a horrible bore that was missed by the QC department. They replaced it pronto and free of charge. This is why I check any new barrel with a bore scope..
Send the barrel back to me for warranty inspection; will send address via PM. We, of course, stand fully behind our products with a warranty for any and all manufacturer's defects.
Sometimes a gas port will have a burr, but it is easily shot out. Very surprised ANY burr in the barrel wouldn't have been shot out cuz we're talkin' extreme forces of pressure and heat.
Regarding the photo, how many lands and grooves are there? Looks like an artillery barrel!
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11-13-2021, 03:25 AM (This post was last modified: 11-13-2021, 04:27 AM by Hollis.)
Here's some more pics. I also added the pic of the Grendel Group Logo that is on the outside of the same barrel from which the bore scope took pictures.
This is my first time with a bore scope and I may have been fooled. This certainly looks like a metal burr, but when I put the mirror attachment on the bore scope (which is much less focused and not that easy to navigate inside the bore), the only thing I can find in this part of the barrel is the gas port. I thought I felt something with the cleaning rod and I moved it slightly, but looking again, it looks the same as before.
Still not 100% sure, but Klem certainly might be on to something.
I am going to shoot this next weekend and let's see if anything moves. It certainly doesn't make sense that, if this were a metal sliver/burr, it would certainly move when a round goes through it. My current thinking is that I simply was fooled as a bore scope rookie.
Measure the distance the bore scope travels down the barrel to that hole. Take it out and lay it alongside the barrel and check if it lines-up with the gas block.
Another way is to run it up and down looking for the port - It will be there.
With unlapped barrels sometimes the gas ports have burrs from the machining process. The first shot will sort that out.
I would bet my last dollar that that is the gas port. I can certainly see where one can be fooled into thinking that is a 'shoulder' of sorts though. The lands & grooves (along with the copper fowling, carbon deposits and the angle of the image) can do a lot in creating a bit of an optical illusion that I believe one see's after looking at the photos.
Speed is Fine, Accuracy is final....but accurate hits at extremely high speed is final much faster.
I don't think you understand, these boys killed my dog!
Taking the gun off safe increases the velocity by 100%
Measure the distance the bore scope travels down the barrel to that hole. Take it out and lay it alongside the barrel and check if it lines-up with the gas block.
Another way is to run it up and down looking for the port - It will be there.
With unlapped barrels sometimes the gas ports have burrs from the machining process. The first shot will sort that out.
I did something similar last night. I marked the spot on the borescope cable where I saw the spot in question and put a mirror attachment on the scope and I can clearly see that this is the same general area of the gas port. Looking at the picture with the thought that it might be the gas port, I can see how that could be exactly what it is. And this makes the most sense since I have shot a lot of bullets down this barrel.
I really appreciate your help. You're the one that helped me to identify this and I am very thankful to you and glad that this isn't a flaw in my barrel. I really like my 6.5 Grendel and have a lot of handloads waiting to shoot that are fireformed to this barrel.
Stugotz Wrote:I would bet my last dollar that that is the gas port. I can certainly see where one can be fooled into thinking that is a 'shoulder' of sorts though. The lands & grooves (along with the copper fowling, carbon deposits and the angle of the image) can do a lot in creating a bit of an optical illusion that I believe one see's after looking at the photos.
Yes. I believe that is exactly what happened. Thanks to all for the help!
