Flare at End of the Brass Neck
- Thread starter PeaShooter
- Start date
jackieschmidt
Gold $$ Contributor
I don’t have a clue what could cause that without taking a good look at the inside of your dies.
I experienced the very same thing for a while, and it drove me nuts. I, too, was cleaning with SS pins and annealing after every firing. I read on here that peening of the case mouth is a consequence of wet tumbling with SS pins and that might contribute to flaring.
I put the wet tumbler aside for a couple of firings and dialed back the time on my induction annealer just a little (for good measure) and the problem was resolved.
I no longer wet tumble - I use an ultrasonic now - and have never had the problem reoccur. My brass isn't as spotless, but it chambers without any interference and loaded rounds measure the same at the case mouth as they do elsewhere on the neck. I'm good with that
I put the wet tumbler aside for a couple of firings and dialed back the time on my induction annealer just a little (for good measure) and the problem was resolved.
I no longer wet tumble - I use an ultrasonic now - and have never had the problem reoccur. My brass isn't as spotless, but it chambers without any interference and loaded rounds measure the same at the case mouth as they do elsewhere on the neck. I'm good with that
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Seems sizing down to much at a time may flare the case mouth also. To much being around .008" + ?
I got the flare running a fired 308 win case into a 243 Redding type S bushing die, with no bushing.
It's from your wet tumbling. Same thing happened with me.
To minimize during tumbling, tumble shorter (25 minutes gets mine shiny clean), use more pins and fewer pieces of brass per cycle.
Make sure to chamfer and deburr after tumbling before seating (I get minimal mushrooming of the mouth, but chamfer and deburr anyway).
To minimize during tumbling, tumble shorter (25 minutes gets mine shiny clean), use more pins and fewer pieces of brass per cycle.
Make sure to chamfer and deburr after tumbling before seating (I get minimal mushrooming of the mouth, but chamfer and deburr anyway).
jghoghunter
Gold $$ Contributor
I don't use any pins and tumble for about 30 minutes. I use a tablespoon of dawn and two tablespoons of lemon juice. The lemon juice concentrate that you buy at the grocery store.
Results are in the pictures below everything turns out fine except you do have to clean the primer pockets. I figured, I did not have to deal with them pins and the possibility of sending one down your barrel I can clean primer pockets.
Results are in the pictures below everything turns out fine except you do have to clean the primer pockets. I figured, I did not have to deal with them pins and the possibility of sending one down your barrel I can clean primer pockets.
Attachments
Is that even possible? I've never heard of that. If anything I've heard the opposite that you cannot hurt the brass by over-annealing.
yes. I use a SAC modular sizing die with a neck bushing and a mandrel. However, after running the brass thru the body die everything seems fine and the mouth is about .002 undersized. But by the time I seat the bullet the mouth of the brass flares. I use a Sinclair inline seat die but still flares if I use a Redding micro seat dies.
Look pretty clean to me. Never even thought about cleaning without the pins before. I use dawn and lemi shine with the pins. Wont cost me anything to try this fix. Thanks
Yes. It can alter the brass composition.
6BRA
Gold $$ Contributor
rwj
Gold $$ Contributor
Interesting. I’ve been wet tumbling with pins for years and never experienced flaring when seating bullets. Definitely have peened end faces after tumbling which is addressed via subsequent trimming/chamfering operations.
I am lucky enough to have a couple hundred 220 Russian brass saved up. Think I will turn down 20 and clean 10 in a USC and 10 in a vibrator type. See what happens. Although I like the idea of cleaning in a rotary (wet) cleaner with no SS pins (someone else here suggested that).
Well Mike I would say its because the bullet is barely into the brass/neck so where I was measuring in the middle hasn't expanded for the bullet cuz the bullet isn't even into the neck that far.
I dont recall saying the neck was .262? Its a .269 neck. I went back and checked my original post and it does say .269. I am using a Sinclair Inline seating die. Its not bottoming out. I talked with SAC before ordering the bushing and mandrel. They were firm on using a bushing die that goes .006 thou past my final size .261 and using the mandrel to size back up to .2415 to allow for some spring back.
Yes, a SAC modular body die. I removed the decap pin and replaced it with a mandrel. I believe its a .261 neck/shoulder bushing and a .2415 mandrel. I am going off memory from posting this info earlier today. The size of the bushing and the mandrel was all SAC's idea/suggestion. They explained it all to me and all made sense even tho using a bushing that small I thought overworked the brass but they insisted.
I was curious at what point it n the loading process is the brass tumbled in the pins?
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