bumping the shoulder .001?

[savagedasher]

My dies and my set up would me do .00005 but my brass doesn't agree. Larry

What?

Paul

www.boltfluting.com

My dies and my press and shell holder are total dead stop or.000000 I would assume. So when press my cases to .000000. When cases come out the very as much as .001 Cant be the die must be the brass.Larry

 

[BoydAllen]

Larry,
Several years back a friend was getting quite a bit of variation of bump using a Forster press. We decided that the problem was unevenness of the factory annealing. The calibers were .338 Lapua and 7mm WSM. These have rather thick brass at their shoulders. Since money was not a problem for him, he bought an annealing machine, that uses two torches, and pauses cases in the flames, with adjustable timing. We used templaq as well as the condition of the annealed brass to set up the machine. What we ended up with was much uniform shoulder bump, with plenty of neck tension for a hunting rifle that would be fed from its magazine. The total variance was .001 after annealing. After that, with continued use of cases after annealing, we saw that they would need to be re-annealed perhaps every third firing to keep bump uniform.
Boyd
PS Merry Christmas

 

[boltfluter]

Thanks Larry,

Makes sense now. Must have been to much JD/coke. Lol. Merry Christmas.

Regards, Paul

www.boltfluting.com

 

[savagedasher]

Larry,
Several years back a friend was getting quite a bit of variation of bump using a Forster press. We decided that the problem was unevenness of the factory annealing. The calibers were .338 Lapua and 7mm WSM. These have rather thick brass at their shoulders. Since money was not a problem for him, he bought an annealing machine, that uses two torches, and pauses cases in the flames, with adjustable timing. We used templaq as well as the condition of the annealed brass to set up the machine. What we ended up with was much uniform shoulder bump, with plenty of neck tension for a hunting rifle that would be fed from its magazine. The total variance was .001 after annealing. After that, with continued use of cases after annealing, we saw that they would need to be re-annealed perhaps every third firing to keep bump uniform.
Boyd Merry Christmas Boyd I find the same and the process I use is the same as yours.
.001 to .005 is fine I never have seen a .00001 Just the heat from your fingers could change the brass that amount
PS Merry Christmas larry

 

[Lightload]

I did not read the entire thread so if this has been covered, I apologize.

IF you're using a split lock ring and you're getting close to your final adjustments, what I do is stick a red marking pen in the split so that it leaves a mark on the threads. That way you have a reference point so that when you loosen and turn the lock ring you can see exactly where you were and make sure that you've moved the ring correctly while retightening the lock screw. It doesn't take much movement of the lock ring to add or delete a thou or two and the reference marks help you make small, precise movements.