scuffing inside of case neck

[josebd]

Yes,I started doing the self alignment thing,and it did helo,now it just leaves a very light mark on the inside of the necks.
I measured the inside diameters of the .223 and 22-250,there both the same.
But it is alot better now.

 

[Brians356]

Yes,I started doing the self alignment thing,and it did helo,now it just leaves a very light mark on the inside of the necks.
I measured the inside diameters of the .223 and 22-250,there both the same.
But it is alot better now.

Polish up the pilot, it should cure the rest.

 

[josebd]

I did,I even bought a new pilot,still did it

 

[Brians356]

I did,I even bought a new pilot,still did it

I guess what's missing in this discussion is knowledge of just what this "scuffing" amounts to, which can only be apbreciated by personal inspection. Two soft metals rubbing together is going to leave some marks on one or both, however insignificant. It's possible the 22-250 brass is a lot softer than the 223. Were the 22-250 and 223 cases made by the same manufacturer? Have they both been resized the same number of times? Have they both been annealed the same number of times (if any)?

What matters, if you cannot eliminate the scuffing you are seeing, is whether it is severe enough to affect the bullet, or the integrity of the brass over time. That's highly subjective, especially without direct inspection of the scuffing, which we don't have. But if I had to guess I'd say it's not significant.

 

[josebd]

does it on new brass,annealed brass,once fired brass,and so on.

 

[josebd]

never has done it on .223 brass

 

[22BRGUY]

One thing I do in the trimming process and have done for quite awhile now, is after at least a 2 angle or 3 angle chamfer job on the case mouth, I take the case and forcibly push the case mouth into a pad of 0000 steel wool and rotate it back and forth several times. I read once that small burrs and sharp angles still exist inside the case mouth unless smoothed out in this manner. I can actually feel the smoothing out of the inside of the case moth as I do this. Afterwards, I gently pass a strong small magnet across the case mouth to remove any possible broken off steel wool particles. I always continuously keep the case mouth pointed downward also so as not to allow either brass burrs or steel wool breakoffs to fall back into the case body. Hope this might help.
Best Wishes