9.3x62 dreaded brass doughnut ring

dutch_m

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brand new brass loaded up , shoots excellent , loads and feeds great bolt closes nice

once i resize it , loaded up 5 rounds and couldn't get the bolt handle to go down, double check to see if still 100 tho off the lands , it was all good ,
then i thought must have super tight chamber , checked again and all good , then i thought i must not be pushing the shoulder back enough , so i resized with a full down to be 100% sure on them being full lenght sized ,

so i was at a loss , couldn't figure it out after reloading for 35 years, called a buddy who has the same 9.3x62 and on the phone , couldnt figure what it was , so i mailed him 10 rounds that i shot and resized , and 2 that were shot and sized ounce and loaded,

when he got them , same thing, they wouldn't load in his rifle , so this made me think i had a bad die , i was using a Hornady and he had a RCBS die , so he went and sized one again and loaded it and the same thing happened again ,with his die , would not close the bolt , now both of us stumped

it came down to just eliminating one step at a time , it had to be the brass , brand new norma brass , 100 bulk i got , when loaded the first time , no troubles at all , feeds and bolt opens and feeds and closes and feeds , empty case pulls out easy , something was happening to the brass and only after firing and only after a full length size , after some light down in the brass we noticed a small small round ring at the base of the neck , we took a drill bit and removed the ring of brass , then loaded the round and it feed perfect , this was the cause of the trouble

after fired and a full length size , the brass got a ring inside down at base of neck , which when a round was seated it was just enough to push the brass out to be super tight in the chamber , on research its called a dough or doughnut ring ,

So now the fix ,

i tried a few with a nice drill bit , not really liking how they looking on the inside of the necks , some stuff i found on the internet is reamers , just cant find one for the 9.3x62 , next was a way of doing a trim on the insides of the necks , some benchrest shooters do this

anyone else have this happen and any opinions on best way to fix this Norma brass , remove that little round ring of brass in the case neck
 
I have no idea what your issue is but I really don't like the solution - feels like the sort of thing that's going to lead to premature case failures to me.

By any chance are you using your sizing die with the decapping pin/expander ball removed?
 
I have no idea what your issue is but I really don't like the solution - feels like the sort of thing that's going to lead to premature case failures to me.

By any chance are you using your sizing die with the decapping pin/expander ball removed?
no , i full length size with the decapping pin and expander ball installed ,

and yes , i do a good full length size , its the brass being moved up in the neck that causes the round dough ring ,

im looking for ways to remove it
 
I didn't read entirely but did you full length resize agressivly? It might be the shoulders not pushed back far enough
yes sir , i double checked it , not that , its that little round ring of brass , that when i seat the bullet , it pushed that spot of brass out hard into the chamber , which then causes the bolt not to close
 
Are the cases trimmed to length? I wonder if the die is pushing the neck downwards due to length?

Or as mentioned above maybe the expander ball is causing issues?

To me it seems like the easier issue to solve is the sizing creating the donut. The neck turning inside or out is a next level step that seems like allot of extra work after every firing?

B
 
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Are the cases trimmed to length? I wonder if the die is pushing the neck downwards due to length?

Or as mentioned above maybe the expander ball is causing issues?

To me it seems like the easier issue to solve is the sizing creating the donut. The neck turning inside or out is a next level step that seems like allot of extra work after every firing?

B
More importantly to me, neck turning is the sort of thing you sometimes need to do with wildcats or using the wrong brass (eg 308win brass to make 243win) but I feel like it shouldn't be necessary if you're using properly headstamped brass in a SAAMI chamber.

I would think something else is the problem, and I'm always of the mindset to figure out what's ACTUALLY wrong rather than just figuring out the easiest way to fix it.
 
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?? Could by chance your expander ball be set to high in the die? As the case gets pulled the ball is sizing the inside of the neck on the way out. this would be the last step in the sizing process. Should that not create the ring on the outside oj the neck?
 
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?? Could by chance your expander ball be set to high in the die? As the case gets pulled the ball is sizing the inside of the neck on the way out. this would be the last step in the sizing process. Should that not create the ring on the outside oj the neck?
i checked it , set up the same as all my dies , i just resized the same 9.3x62 in PPU brass and no ring formed on the inside of the case at base of neck ,
this only happens on the brand new Norma brass , after i fire it ounce and then go to resize, all is good till i push a bullet into it , then it wont let me close bolt , cases all trimed 10'tho below max, bullet seat 100'tho from lands as it a Barnes TTSX in 250 gr ,

the little ring is push out as the bullet is seated and that puts it tight agaist my chamber wall , the brass grows and makes the ring , is info on the net

im just trying to find others who have seen this and the best way to remove the ring on the inside of the case ,

next time i fire a few new at the range , i'll just try neck sizing them only and see if that stops the ring from forming ,
 
More importantly to me, neck turning is the sort of thing you sometimes need to do with wildcats or using the wrong brass (eg 308win brass to make 243win) but I feel like it shouldn't be necessary if you're using properly headstamped brass in a SAAMI chamber.

I would think something else is the problem, and I'm always of the mindset to figure out what's ACTUALLY wrong rather than just figuring out the easiest way to fix it.
exacty , this has me thinking that just maybe as i got it in bulk size , that maybe its stamped 9.3x62 , but it was made from the 30-06 casings or dies that Norma used to make it
 
Doesn't look like a lot of boattail on those bullets. You are seating them .100" off the lands. Have you tried loading them .020", .030", .040", .050" off the lands?
 
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Doesn't look like a lot of boattail on those bullets. You are seating them .100" off the lands. Have you tried loading them .020", .030", .040", .050" off the lands?
No sir
I think I would be on the lands and still have some of that bullet on that ring
Which would bulge it out

So far I have found Wilson trimmers and reamers , at $250 US that does ream it out

I have been useing a 23/64 drill bit , it’s very close , I wish I had a 24/64 as i think it would be the trick
 
Case neck donut is not an unheard of concept. It shows up more often in cases that have been neck turned, as the thicker material in the shoulder moves forward. Could be that the brass were made from a 30-06 base and the thinker shoulder material made its way into the neck when it was expanded. Inside neck reamer is the best solution. Not a lot available in 9.3 but forester will make custom diameter reamers.
 
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Case neck donut is not an unheard of concept. It’s shows up more often in cases that have been neck turned, as the thicker material in the shoulder moves forward. Could be that the brass were made from a 30-06 base and the thinker shoulder material made its way into the neck when it was expanded. Inside neck reamer is the best solution. Not a lot available in 9.3 but forester will make custom diameter reamers.
Sure but he’s using brand new Norma brass.
 
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The last thing touching the inside of your neck is the expander ball expanding the neck out. How can a raised ring still be there?
donuts may be partially ironed out or it gets pushed to the outside where it can deform the neck/shoulder juncture spec, which may in turn effect chamber fit and pressure? idk but it seems to be a thing
 
Case neck donut is not an unheard of concept. It shows up more often in cases that have been neck turned, as the thicker material in the shoulder moves forward. Could be that the brass were made from a 30-06 base and the thinker shoulder material made its way into the neck when it was expanded. Inside neck reamer is the best solution. Not a lot available in 9.3 but forester will make custom diameter reamers.
your correct, the more searching i do, the more i seem to find it happens , reamer is the best , for me , first im going to just try a drill bit in up 1 more size 3/8 , or one more then that , just a supper snug fit and im sure it will just remove that tiny bit of a round ring of brass ,
 
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