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Dimpled brass
- Thread starter Okdeerman
- Start date
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Possibly pressure is too low.
Neck not sealing and letting pressure escape pushing that area of the shoulder in.
Neck not sealing and letting pressure escape pushing that area of the shoulder in.
- Joined
- Jan 26, 2015
- Messages
- 1,844
If this were the case, wouldn't there be soot in/near the dimple?
As mentioned above, this is a sign of Low
Pressure, and possibly lite neck tension.
Pressure, and possibly lite neck tension.
Yes the bullet is .002 back of the lands which does make a minimal amount of bullet in the neck. I am glad you responded because that thought had crossed my mind. Should I seat the bullet a little deeper or try increasing the powder?
I would seat deeper. You may not have much more room pressure-wise to add powder and would probably still have the same issue.
As long as you are not trying to fireform an ackley shoulder and are pushing the 270 shoulder back to the correct headspace dimension with the sizing die, I would seat the bullet into the neck so that the bearing surface of the bullet is just forward of the neck-shoulder junction(option 1).
At a minimum, I would seat the bullet with bearing surface halfway into the neck. (option 2)
It really depends on how the rifle shoots with the bullet seated deeper.
I prefer option 1, and usually have the freebore set for my bullet 0.020" off lands at this seating depth, if possible.
As long as you are not trying to fireform an ackley shoulder and are pushing the 270 shoulder back to the correct headspace dimension with the sizing die, I would seat the bullet into the neck so that the bearing surface of the bullet is just forward of the neck-shoulder junction(option 1).
At a minimum, I would seat the bullet with bearing surface halfway into the neck. (option 2)
It really depends on how the rifle shoots with the bullet seated deeper.
I prefer option 1, and usually have the freebore set for my bullet 0.020" off lands at this seating depth, if possible.
- Joined
- Aug 28, 2017
- Messages
- 365
Either way, only change one thing at a time
