kilotanker22
New member
Hello,
Recently I acquired an Interarms mark x in 7mm remington magnum. Shoots ok, But I have noticed that after only one firing New brass is difficult to chamber. Now This is after Sizing and trimming. Also after verifying that the area in front of the belt is not swollen. Still measures .510-.511....
The rounds definitely still chamber, but some with a good bit of resistance. Being that The area in front of the belt had not yet grown out of the acceptable range. I figure the brass must be hanging up somewhere else.
So I resized a piece of once fired brass, trimmed and what not. Then seated a bullet to make a dummy round. Colored the entire thing with a marker. And the chambered the round.
The only marks on the dummy round were from the magazine and shoulder where it was dragged across the ramp to load.
The only other spot That marker was worn off was a small spot on the belt itself. I also noticed that it not only removed the marker in that spot, but also removed a very small amount of brass from the belt in that spot only.
So I got out my bore light and after careful observation I found what I believe to be a bur in the chamber. Right where the belt of the case sits into it. It is not large, but when looking at the right angle it is visible.
What is the best way to remove this?? I have seen a person once before use strips of sand paper in a cleaning eyelet and an electric drill. I guess that would be ok, but I am sure the masses here have a better alternative.
Thanks in advance for any insight.
P.S. I would post a photo, but there is no way i will be able to get it to focus so you can see
Recently I acquired an Interarms mark x in 7mm remington magnum. Shoots ok, But I have noticed that after only one firing New brass is difficult to chamber. Now This is after Sizing and trimming. Also after verifying that the area in front of the belt is not swollen. Still measures .510-.511....
The rounds definitely still chamber, but some with a good bit of resistance. Being that The area in front of the belt had not yet grown out of the acceptable range. I figure the brass must be hanging up somewhere else.
So I resized a piece of once fired brass, trimmed and what not. Then seated a bullet to make a dummy round. Colored the entire thing with a marker. And the chambered the round.
The only marks on the dummy round were from the magazine and shoulder where it was dragged across the ramp to load.
The only other spot That marker was worn off was a small spot on the belt itself. I also noticed that it not only removed the marker in that spot, but also removed a very small amount of brass from the belt in that spot only.
So I got out my bore light and after careful observation I found what I believe to be a bur in the chamber. Right where the belt of the case sits into it. It is not large, but when looking at the right angle it is visible.
What is the best way to remove this?? I have seen a person once before use strips of sand paper in a cleaning eyelet and an electric drill. I guess that would be ok, but I am sure the masses here have a better alternative.
Thanks in advance for any insight.
P.S. I would post a photo, but there is no way i will be able to get it to focus so you can see