• This Forum is for adults 18 years of age or over. By continuing to use this Forum you are confirming that you are 18 or older. No content shall be viewed by any person under 18 in California.

DPMS 6.5 creedmoor Barrel with off center chamber?

I received this barrel today and during inspection I noticed something that's bugging me. It appears that the chamber maybe cut slightly off center.... I'm seeing an edge at the beginning of the throat/lands and it's on one side but not the other. Here are some pictures of the throat at different angles. Opinions please? (gunsmiths preferably)









 
Don't know that any of the pictures are from an exact center of the barrel. Also not sure that if any were, you could see the few thousands it might be off.

Take it to someone who can actually do the measurement.
 
CaptainMal said:
Don't know that any of the pictures are from an exact center of the barrel. Also not sure that if any were, you could see the few thousands it might be off.

Take it to someone who can actually do the measurement.

Couldn't get a good one for the exact center but if you look at the picture one side has a lip/edge where the throat starts and the other side doesn't. Judging by the height of the lands it looks like it maybe .001-.0015 off. I'm no gunsmith though so I wanted opinions.
 
InkedIan said:
CaptainMal said:
Don't know that any of the pictures are from an exact center of the barrel. Also not sure that if any were, you could see the few thousands it might be off.

Take it to someone who can actually do the measurement.

Couldn't get a good one for the exact center but if you look at the picture one side has a lip/edge where the throat starts and the other side doesn't. Judging by the height of the lands it looks like it maybe .001-.0015 off. I'm no gunsmith though so I wanted opinions.

Just some FYI, The lip/edge that you are seeing is in the bore after where the throat/freebore has started, just thought you might like to know :).
 
boltman223 said:
InkedIan said:
CaptainMal said:
Don't know that any of the pictures are from an exact center of the barrel. Also not sure that if any were, you could see the few thousands it might be off.

Take it to someone who can actually do the measurement.

Couldn't get a good one for the exact center but if you look at the picture one side has a lip/edge where the throat starts and the other side doesn't. Judging by the height of the lands it looks like it maybe .001-.0015 off. I'm no gunsmith though so I wanted opinions.

Just some FYI, The lip/edge that you are seeing is in the bore after where the throat/freebore has started, just thought you might like to know :).

Actually the edge is where the throat begins, the freebore is before that. The edge isn't the concern it's the fact that there isn't an edge all the way around or the lack there of all the way around. I believe the chamber was not cut concentric to the bore. We'll see if DPMS agrees
 
boltman223 said:
InkedIan said:
boltman223 said:
InkedIan said:
CaptainMal said:
Don't know that any of the pictures are from an exact center of the barrel. Also not sure that if any were, you could see the few thousands it might be off.

Take it to someone who can actually do the measurement.

Couldn't get a good one for the exact center but if you look at the picture one side has a lip/edge where the throat starts and the other side doesn't. Judging by the height of the lands it looks like it maybe .001-.0015 off. I'm no gunsmith though so I wanted opinions.

Just some FYI, The lip/edge that you are seeing is in the bore after where the throat/freebore has started, just thought you might like to know :).

Actually the edge is where the throat begins, the freebore is before that. The edge isn't the concern it's the fact that there isn't an edge all the way around or the lack there of all the way around. I believe the chamber was not cut concentric to the bore. We'll see if DPMS agrees

I understand your concern about concentricity. And I was taught that throat and freebore refer to the same thing. On all my reamers there is nothing in the freebore/throat that would create an edge like that, even if cut off center. I just think it's odd that that it created an edge like that.

I always referred to the throat as the tamper/ramp that starts at the end of the freebore and ends at the full height of the lands.... hmmm
 
Couldn't you take a case with a bullet seated way out and colored with a sharpie and see how the bullet contacts the lands. cliffe
 
cliffe said:
Couldn't you take a case with a bullet seated way out and colored with a sharpie and see how the bullet contacts the lands. cliffe
PLUS 1 on doing that....
Just did that to a 338 Hart with a problem, and only 3 sides out of 6 showed marks, and it didn't shoot all that good.
The new 338 Edge chamber shows 6 square marks like it should...
 
First thing I see wrong is you should of contacted DPMS. Then if they didn't fix the problem then you were ok posting it on here. Larry
 
savagedasher said:
First thing I see wrong is you should of contacted DPMS. Then if they didn't fix the problem then you were ok posting it on here. Larry

I did contact DPMS and they did say send it in for inspection... I'm not sure what you see as wrong? Believe it or not there are probably plenty of people that never even think to look for imperfections like this until they see it on forums like this one. I in no way bad mouthed DPMS, only wanted opinions on the problem and to show it's good to inspect parts before installing them and using them. EVERYONE puts out a lemon here and there...
 
Preacher said:
cliffe said:
Couldn't you take a case with a bullet seated way out and colored with a sharpie and see how the bullet contacts the lands. cliffe
PLUS 1 on doing that....
Just did that to a 338 Hart with a problem, and only 3 sides out of 6 showed marks, and it didn't shoot all that good.
The new 338 Edge chamber shows 6 square marks like it should...

Doing this may yield the wrong results unless the loaded round has absolutely no runout.
 
" yield the wrong results" , No , the bullet would try to center on the rifling and touch the SAME on all sides, if it is straight the marks would be similar and the bullet should push straight back. If it is off the contact marks will be different. Put a index mark on the cases and try recoloring the bullet and put the bullet and case in 180 degrees from the last time and compare to what it looked like before. cliffe
 

Upgrades & Donations

This Forum's expenses are primarily paid by member contributions. You can upgrade your Forum membership in seconds. Gold and Silver members get unlimited FREE classifieds for one year. Gold members can upload custom avatars.


Click Upgrade Membership Button ABOVE to get Gold or Silver Status.

You can also donate any amount, large or small, with the button below. Include your Forum Name in the PayPal Notes field.


To DONATE by CHECK, or make a recurring donation, CLICK HERE to learn how.

Forum statistics

Threads
166,825
Messages
2,223,710
Members
79,910
Latest member
Kenhughes94
Back
Top