Why is Resizing belling my neck mouth?

[600-60x]

Has anyone solved this?
I see im not the only one running into this 6mm necks turned to.13 redding bushing die and I clean with ultrasonic no pins
reloading for 40 years never ran into this issue

 

[Mike Samer]

How much smaller than the fired diameter are you sizing to? I have run into this with thin walled .308 WW brass if sizing down too far in one step. They also ended up smaller than the bushing diameter.

 

[snert]

Adjust the threaded stem inward.

Adjust the die upward a "Scooch"

There are three "adjustments" in a bushing die. One is how far you screw the die "down". One is how long you make the stem. The other is how far the stem is seated into the upper portion of the die. All three can effect what you are talking about. Bottom line is you are pushing the case into the face of the shelf that holds the bushing. Ask me how I know...I literally just made a 22 BR case from a 6BR case and first try I belled the case mouth. A combo of the above and I fixed it. I also trimmed the case a tad since this is just a "try" case that will never be loaded or fired.

 

[Fuj]

Are you annealing ?? Different case different bullet and neck diameter
but, here is something to check......I had a similar issue with the mouths
being belled. for some reason, my flame had got knocked or bounced
so that it was too low on the neck and more to the shoulder. Case mouths
ended up too hard and springing back. Since that time, I run a two flame
head on a fixed bracket to cure that.

 

[600-60x]

Are you annealing ?? Different case different bullet and neck diameter
but, here is something to check......I had a similar issue with the mouths
being belled. for some reason, my flame had got knocked or bounced
so that it was too low on the neck and more to the shoulder. Case mouths
ended up too hard and springing back. Since that time, I run a two flame
head on a fixed bracket to cure that.

I use a amp annealer every reload good to know thanks

 

[600-60x]

Adjust the threaded stem inward.

Adjust the die upward a "Scooch"

There are three "adjustments" in a bushing die. One is how far you screw the die "down". One is how long you make the stem. The other is how far the stem is seated into the upper portion of the die. All three can effect what you are talking about. Bottom line is you are pushing the case into the face of the shelf that holds the bushing. Ask me how I know...I literally just made a 22 BR case from a 6BR case and first try I belled the case mouth. A combo of the above and I fixed it. I also trimmed the case a tad since this is just a "try" case that will never be loaded or fired.

the body is screwed down to give me the shoulder bump i want i don’t have a stem just a solid cap to hold the bushing down
i back off 1/16-1/8 turn to give the bushing a little wiggle room to align

 

[600-60x]

How much smaller than the fired diameter are you sizing to? I have run into this with thin walled .308 WW brass if sizing down too far in one step. They also ended up smaller than the bushing diameter.

.9
.274 fired neck .265 bushing
Just tried two stepping it same

 

[J_idaho]

Following

 

[Coyotefurharvester]

Is the bushing thicker than the neck is long. When I run my Redding bushing die (223,20p,204R) with no stem I need to put a second bushing(larger ) stacked on top.

 

[600-60x]

Is the bushing thicker than the neck is long. When I run my Redding bushing die (223,20p,204R) with no stem I need to put a second bushing(larger ) stacked on top.

it’s a 6xc neck is about.270 long well inside the bushing it shoots 1/4 minute so it’s not affecting accuracy
(or maybe it could be better) lol
Just should not be

 

[Toms]

the body is screwed down to give me the shoulder bump i want i don’t have a stem just a solid cap to hold the bushing down
i back off 1/16-1/8 turn to give the bushing a little wiggle room to align

I use a small O ring on stem for the clearance on bushing and die. Works good. Toms

 

[tommeboy]

After annealing you have to clean and lube the neck before you can size. They can get real sticky if you don't.

 

[LCazador]

.274" fired neck sizing with .265" bushing? That sounds like way too much unless you have a typo. If your neck is .013" (you have .13 in your post) that would be a .269" loaded diameter so yes a .265" bushing would work. Are you using an expander?

 

[600-60x]

Has anyone solved this?
I see im not the only one running into this 6mm necks turned to.13 redding bushing die and I clean with ultrasonic no pins
reloading for 40 years never ran into this issue

I would try pulling an expander ball through if I had one

 

[600-60x]

Has anyone solved this?
I see im not the only one running into this 6mm necks turned to.13 redding bushing die and I clean with ultrasonic no pins
reloading for 40 years never ran into this issue

I Put a call into redding today
turns out they were in contact with amp annealing about this issue
It can be caused by annealing every time??
Try sizing only half the neck
We will see

 

[Webster]

Has anyone solved this?
I see im not the only one running into this 6mm necks turned to.13 redding bushing die and I clean with ultrasonic no pins
reloading for 40 years never ran into this issue

Redding bushing die never had it happen since 2009. I pull the decapping pin/mandrel out of the die. Decap with an older 6BR FL die as a separate operation. I run the pin down so it just pushes the primer out, no sizing.