Shoulder bumping FFS

[Tikkat1x]

Iv also had problems in the past with my expander mandrel lengthening my brass OAL.
So it was suggested to skim the expander ball down a bit and then finish off with the mandrel. Which worked. And if it would have been the expander ball pulling my brass. Would t that make it longer not shorter??

 

[nocturnaldave]

lol… we have all done that at some point. Clean the die internally. How many times has your brass been fired and annealed? Nothing lasts forever?

 

[Liveonce]

will not lubricating the inside of the neck result in inconsistent neck tension to hold the bullet? I never lube the inside of the neck.

 

[nocturnaldave]

Step back…. Can you confirm the type of sizing die your using… simple full size or bushing die?

 

[Tikkat1x]

lol… we have all done that at some point. Clean the die internally. How many times has your brass been fired and annealed? Nothing lasts forever?

Sako brass. Fired 6-7 times.

 

[Tikkat1x]

Step back…. Can you confirm the type of sizing die your using… simple full size or bushing die?

Standard redding FL die.

 

[nocturnaldave]

It’s getting on a bit if your annealing every time…. Some will tell you plenty of life left yet but my experience is that that is about it’s life cycle before the brass becomes to inconsistent.

 

[nocturnaldave]

Least you havnt got to tight a bushing in it…. I’d give it one last shot using a better lubing scenario with the expander ball still out.

 

[Tikkat1x]

im probably going to go with brass life, its funny how it never used to do this, same with my 223 brass, thats hornady and sako and that was always ok, now thats a C*&t too, thats been shot 6-7 times too,
one thing for sure is, new brass will do me no harm iv had to stop trying now as its doing my tits in

 

[Tikkat1x]

thanks for the help chaps, i will get new brass and take it from there,

 

[nocturnaldave]

lol… only things you can still have wrong are…. 1. Dirty die…. 2. Excessively long long necks on the overall case neck 3 A large end of the scale chamber and your asking the die to do too much in one go. 4. Dirty external cases and poor lube.

 

[nocturnaldave]

Overall case length…. Dam predictive text!!!

 

[nocturnaldave]

Dear Santa I want brass?

 

[Tikkat1x]

lol… only things you can still have wrong are…. 1. Dirty die…. 2. Excessively long long necks on the overall case neck 3 A large end of the scale chamber and your asking the die to do too much in one go. 4. Dirty external cases and poor lube.

new dies only 2 weeks ago, had a good clean then to et the packing grease off, necks are all within range, lower end actually, i run my cases through a ultrasonic cleaner after depriming, and before i resize,

 

[Jagged77]

One thing not mentioned, how good are your verniers and are you measuring consistently?

 

[Tikkat1x]

One thing not mentioned, how good are your verniers and are you measuring consistently?

i think there fine, i some times check a case several times and its always the same, and i made 100 223 rounds the other day and the seating depths were bang on every time, i pretty much measure everything nowadays as iv had that much bother of late,

 

[HandB]

I suggest stop measuring shoulder bump as I find it tends to drive me crazy. Instead start from scratch again. First of all screw the resizing die down only until it touches the shellholder. Then size a fired case, wipe off the lube and try it in your rifle's chamber. If the bolt is reluctant to close, screw the die down by a tiny amount (about 1/8th of a turn) and repeat. Keep doing this until the bolt closes normally on the case. Then put a layer of 3m scotch tape (which is consistently 2thou thick) on the base of the sized case. If the bolt once again becomes reluctant to close due to the thickness of the scotch tape then the case is sized correctly, at 2thou less than the chamber size.

 

[Tikkat1x]

I suggest stop measuring shoulder bump as I find it tends to drive me crazy. Instead start from scratch again. First of all screw the resizing die down only until it touches the shellholder. Then size a fired case, wipe off the lube and try it in your rifle's chamber. If the bolt is reluctant to close, screw the die down by a tiny amount (about 1/8th of a turn) and repeat. Keep doing this until the bolt closes normally on the case. Then put a layer of 3m scotch tape (which is consistently 2thou thick) on the base of the sized case. If the bolt once again becomes reluctant to close due to the thickness of the scotch tape then the case is sized correctly, at 2thou less than the chamber size.

that wont help with inconsistent bump though, i need to work out what the problem is first, im sure all the brass will fit my chamber as a lot is bumped properly, and the rest is under, how much under becomes a problem??

 

[HandB]

that wont help with inconsistent bump though, i need to work out what the problem is first, im sure all the brass will fit my chamber as a lot is bumped properly, and the rest is under, how much under becomes a problem??

Yes - I had the same issue, it turns out the traditional method for setting up a resizing die is too aggressive and produces a significant proportion of these overly shrunken cases of which you speak. This 3M scotch tape method is much gentler and more consistent, I suggest trying it out as you may be pleasantly surprised.

 

[Tikkat1x]

Yes - I had the same issue, it turns out the traditional method for setting up a resizing die is too aggressive and produces a significant proportion of these overly shrunken cases of which you speak. This 3M scotch tape method is much gentler and more consistent, I suggest trying it out as you may be pleasantly surprised.

Definitely worth a try mate.