Shoulder Bump questions

[FlyGuy]

Shims make sizer die adjustments much easier, btw.

https://bulletin.**NOT**PERMITTED**...loader-die-shims-for-full-length-sizing-dies/

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100%!!!
They make die set-up for shoulder bump a lot easier.

 

[SaintPanzer]

Yes, I watched that video several times before I started. Still didn't keep me from going too far. I really think switching to a single stage press with limited flex is going to help me in this case. But the real question is recovering that brass where I went too far, and "light loads" seems to be the answer.

 

[Bob Nelson 35Whelen]

I was taught to resize to the chamber, not some arbitrary size in a book. It does make it a bit more difficult for multiple rifles of the same cartridge with different ammunition requirements, but not insurmountable as a texta mark on the bottom shows which rifle it belongs to.
Gumpy

@Grumpy gumpy
I was taught to neck size only providing the brass was only used in that particular rifle.
I neck size only until the cases get a bit hard to chamber
When they get to that stage ( usually around 5-6 reloads depending on the case) I then full length size screwing the die down in small amounts until the cases chambers with just the slightest bit of resistance. After that I trim cases to length and chamfer the case mouth inside and out. Once the case is fully prepared I then anneal the neck and shoulder.
A little bit of work but greatly extends case life and well worth the effort as brass ain't cheap nowadays.
This method has worked for me for a long time .

One thing I recommend to every reloader is purchased a STUCK CASE REMOVER. It's not a matter of I will never get a stuck case because sooner or later Murphy steps in and it WILL HAPPEN. $15 of insurance is cheaper than a new die. It has happened to me twice and glad I had it.
Bob

 

[Bob Nelson 35Whelen]

Will try shooting with a light load.

It's that "moving down in small increments" piece that I took too far. Had it from .094 to .089. Tried to get .002 more, and ended up with .004 more...

@SaintPanzer
The safest way I know of to fix a case that has had the shoulder pushed back to far is:-
Neck the case up to a bigger caliber
Then resize the neck slowly until the bolt closes with some resistance. This puts a false shoulder on the case and it can then be fired safely without head space issues.

Firing a case with a light load and a shoulder that has been bumped back to far can lead to incipient case head failure as the case stretches back.
The only other way I know if is to load a projectile so it is hard up against the lands with a light load. This will stop the case being driven forward by the firing pin and causing case stretching that can lead to case head seperation eventually.
Bob

 

[Bob Nelson 35Whelen]

Yes, I watched that video several times before I started. Still didn't keep me from going too far. I really think switching to a single stage press with limited flex is going to help me in this case. But the real question is recovering that brass where I went too far, and "light loads" seems to be the answer.

@SaintPanzer
That's why I love rimmed cases. Doesn't matter if you bump the shoulder back to far as it will fire form easy as the case had spaces off the rim.
People make the same mistake with belted case head spacing off the belt instead of the datum line. This leads to incipient head seperation as well.
Bob

 

[Grumpy gumpy]

@Grumpy gumpy
I was taught to neck size only providing the brass was only used in that particular rifle.
I neck size only until the cases get a bit hard to chamber
When they get to that stage ( usually around 5-6 reloads depending on the case) I then full length size screwing the die down in small amounts until the cases chambers with just the slightest bit of resistance. After that I trim cases to length and chamfer the case mouth inside and out. Once the case is fully prepared I then anneal the neck and shoulder.
A little bit of work but greatly extends case life and well worth the effort as brass ain't cheap nowadays.
This method has worked for me for a long time .

One thing I recommend to every reloader is purchased a STUCK CASE REMOVER. It's not a matter of I will never get a stuck case because sooner or later Murphy steps in and it WILL HAPPEN. $15 of insurance is cheaper than a new die. It has happened to me twice and glad I had it.
Bob

This is what I meant by fit the chamber, just better explained.
Gumpy