Rich Coyle
Well-Known Member
Anyone have any idea what's causing this bulge and how to correct it. It's on both cases. All I did was neck up the existing and using 6.5 Coyle to 8mm. The bullet I want to use is the Hammer Hunter bullet.
An unwanted bulg
- Thread starter Rich Coyle
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looks like you tried to crimp looks like you need to back the seater die back
The necking up process looks like it took some shoulder material up into the neck. seating a bullet looks to have pushed that thicker area of brass to the outside.
To test, neck one up, then run the resulting case through a neck arbor . This is the dreaded donut.
To test, neck one up, then run the resulting case through a neck arbor . This is the dreaded donut.
elkaholic
Well-Known Member
You probably got some thicker shoulder material pushed into the neck
May have to ream/turn necks
May have to ream/turn necks
time to buy a neck turning tool!
Rich Coyle
Well-Known Member
crystalgayleguy,
Don't have a die yet.
30BR,
Don't have a neck arbor.
elkaholic & Korhil78,
I turned the necks when they were 7 Rem Mag brass. I guess I need to maybe get a die and neck size them and ream the inside.
Thanks, everyone.
Don't have a die yet.
30BR,
Don't have a neck arbor.
elkaholic & Korhil78,
I turned the necks when they were 7 Rem Mag brass. I guess I need to maybe get a die and neck size them and ream the inside.
Thanks, everyone.
elkaholic
Well-Known Member
elkaholic
Well-Known Member
You MIGHT get by with turning if you iron out the inside. Better if you dont have to ream!
Rich Coyle
Well-Known Member
I think you are correct. Looks like I have to wait for the dies.
Use an expanding mandrel to push the irregularities to the outside then turn neck to remove them I feel reaming inside of the neck just rough them up
freddiej
Well-Known Member
I have a concern with this. neck up the brass and do not put a slug in the case and see if there is that bulge in the neck. if it is there then it seems to be a material issue and reaming would be appropriate remedy, IF not, then the seating is the issue. but at first it looked like a stretch issue and the curved part was a thinning of the neck that would have separated. then I noticed the bottom of the mark was larger than the top. .
Rich Coyle
Well-Known Member
freddiej,
I will try what you are saying. I used an elliptical expander from an 8mm die.
I will try what you are saying. I used an elliptical expander from an 8mm die.
Rich Coyle
Well-Known Member
I did what freddiej suggested. After forming the neck I used my inside the neck and inside the chamber pick to feel if there was a bump on the inside. It was pleasantly smooth. Looks like a new mandrel for the neck turner is in order.
Thanks, guys. I normally neck down so have not had this before.
Thanks, guys. I normally neck down so have not had this before.
Andrew Cowling
Well-Known Member
Interesting case.
I did something simular 15 years ago called a 308 AC magnum. Turning off the belt was an interesting exercise.
