Die was scratching necks

[PigButtons]

Sorry for the less than perfect photos. First pic is of the scratched neck that started shortly after beginning to size a batch of new 22 Hornet cases in order to FF to 22 K Hornet. The scratches were deep enough that you could feel them with a fingernail.






Next is the entry point for the case mouth into the die just above the shoulder. Just above the bright line is a row of small brownish gold flecks. That is brass that is stuck firmly to the die. The brass was present on about 3/4 of that transition point of the die




I tried cleaners, brushes, patches, but none would remove the brass. So I cut a small triangle from a grey nylon scrubbing pad and stuck it on the end of an old nylon bore brush. Then I chucked it up in a cordless drill and spun it in the neck and shoulder area for about three minutes total before the brass was removed as seen in the last pic.






What I found was that the PPU brass had a pronounced burr around about 1/2 of the case mouth that my Lyman chamfering tool wouldn't remove. When it would pass through the step into the neck it would weld it to the die. So I started removing the burr with a fine bastard file and the problem didn't return for the remainder of the batch.

 

[chop house]

i just went through the same thing with a bushing. that deposited brass is surprisingly hard to remove. thanks for the tool tip. sounds better than 000 steel wool, which left a mess to clean up afterwards.

 

[Uncle Ed]

You can also remove the brass from the die with a "strong" bore cleaner and no scrubbing. Any of the ones if you sniff them that curls your nose hairs and completely cleans out your sinuses will get the job done.

 

[PigButtons]

You can also remove the brass from the die with a "strong" bore cleaner and no scrubbing. Any of the ones if you sniff them that curls your nose hairs and completely cleans out your sinuses will get the job done.

I'm sure this is the case ( no pun intended ), with some brands of brass, but I tried "Butch's" which comes in a protective enclosure and has a big "Use only in a well ventilated area", warning label. PPU may be more problematic because of the brass formula which seems to be a little harder than most. It is the only brass I have that turns sort of a purple-brown color when tumbled.

But if I encounter this problem again with R.P., L.C., Lapua, etc. I'll definitely try the cleaners again for sure. Thanks for the tip.

The neck scratching is something I haven't encountered before but when searching found out it happens a lot.

 

[Fuj]

I had to polish out a 30/30 die for a customer. looked like
no lube was used in the sizing process. Filled the sizer with
Sweets and left it sit over night,

 

[vonb]

I've used a couple applications of foaming bore cleaner and it worked in removing brass from the wall of the die.

 

[bozo699]

Bu

I'm sure this is the case ( no pun intended ), with some brands of brass, but I tried "Butch's" which comes in a protective enclosure and has a big "Use only in a well ventilated area", warning label. PPU may be more problematic because of the brass formula which seems to be a little harder than most. It is the only brass I have that turns sort of a purple-brown color when tumbled.

But if I encounter this problem again with R.P., L.C., Lapua, etc. I'll definitely try the cleaners again for sure. Thanks for the tip.

The neck scratching is something I haven't encountered before but when searching found out it happens a lot.

Butches bore shine is very mild compared to sweets or Barns x and a few others. I use a lot of Butches but it’s not my choice for heavy copper remover
Wayne

 

[Iowa Fox]

Scratches on the neck are a fairly common issue. First time for me was the 357 in a carbide die. I drank the kool aid when carbide first came out that they don't require lube. All was well for the first 5-6 K rounds then I noticed scratches. Second time was with the 223 in a marathon loading session trimming and deburring with the oldest son. Both times bore cleaner on a paper towell and about an hour soak time before the nylon brush. Both times the junk came out easy. I'm not planning a third time as I have corrected the cause. Even if its a five gallon bucket of 223 headed for the Dillon.

 

[PigButtons]

I, as usual, am truly humbled by the helpful and knowledgable comments. This website and the members here are a great blessing and I hope it continues to serve our community as much as it has me over the years.

Thanks to all, not only for this thread but for all of your contributions.