Clickers

[Uncle Ed]

Dies and chambers can vary in size, as an example, I have a Lee full length .223 die that will reduce the case body diameter more than my RCBS .223 small base die.

So yes a small base die will reduce the case body diameter more. But you may have a die on the plus side that is not reducing the body diameter enough to compensate for brass spring back. Meaning by just trying another full length die or pausing at the top of the ram stroke may fix the problem.

Below three types of Forster .308 dies.

 

[LVLAaron]

Just curious, what's the reason behind the national match die? Is there a specific discipline or chamber type that this is preferred?

 

[LC Tikka]

What is the actual noise, bolt striking the stop???
LC

 

[Steve Blair]

"Clickers" is what Unix admins once called Windows admins. It was not a compliment.

 

[Uncle Ed]

Just curious, what's the reason behind the national match die? Is there a specific discipline or chamber type that this is preferred?

Tag Archives: match .308 chamber
AMMUNITION, RELOADING, RELOADING CORNER, RIFLES
RELOADERS CORNER: 5 SIMPLE STEPS TO M1A RELOADING SUCCESS
JULY 20, 2017 GLEN ZEDIKER 7 COMMENTS
http://www.mssblog.com/tag/match-308-chamber/

"Match-spec M14 chambers are decidedly NOT NATO! They’re .308 Winchester, pretty much. I say “pretty much” because they’re on the minimum side, dimensionally, compared to SAAMI commercial guidelines for .308 Win. Lemmeesplain: the true “match” M14 chamber is short, in throat and in headspace.

Given this, that’s why a “match” M1A chamber is different than a SAAMI. It was built to maximize Lake City Match accuracy. That’s a short round. The headspace is a few thousandths under what’s common on a chamber based around commercial .308 brass. 1.630-inch cartridge headspace height is regarded as minimum for commercial."

 

[BoydAllen]

is there a die that just squeezes the base to the proper size?

Small base dies are just FL dies that are made smaller where they size the base of the case. The die that only sizes the base of the case is called a ring die.

 

[bozo699]

Dies and chambers can vary in size, as an example, I have a Lee full length .223 die that will reduce the case body diameter more than my RCBS .223 small base die.

So yes a small base die will reduce the case body diameter more. But you may have a die on the plus side that is not reducing the body diameter enough to compensate for brass spring back. Meaning by just trying another full length die or pausing at the top of the ram stroke may fix the problem.

Below three types of Forster .308 dies.

Ed,
You like Forster Dies?........
Wayne

 

[bozo699]

What is the actual noise, bolt striking the stop???
LC

Primary extraction struggling to pop the case from the chamber.
Wayne

 

[Uncle Ed]

Ed,
You like Forster Dies?........
Wayne

Yes Wayne I like Forster dies, they are much better than the Lee and Lyman dies you use every day.

Bazinga!

 

[Evan]

"Clickers" is what Unix admins once called Windows admins. It was not a compliment.

I assume due to Windows users' propensity for the mouse in lieu of the keyboard?

 

[Steve Blair]

I assume due to Windows users' propensity for the mouse in lieu of the keyboard?

Yes and, by implication, lack of knowledge regarding operating systems.

 

[1911nut]

So brass can click, why does it affect where the bullet goes?

 

[rwj]

So brass can click, why does it affect where the bullet goes?

For those trying to shoot quickly (under the same conditions), excessive force on the bolt handle to eject the case can disturb the rifle’s position in the rests which can adversely effect group size. If time between shots is not an issue, the impact will likely be minimal.

 

[1911nut]

I believe many short range BR shooters don’t reload brass that clicks. Tony Boyer mentions in his book he shoots brass until it clicks.

I’m wondering why reloading brass that clicks sends the bullet to a different place than brass that doesn’t click.

I’m isolating, not much going on, tired of watching the garden grow

 

[Hohn]

Did we post on the same facebook group about a certain glue paste eater eating glue paste while giving sizing advice?

Nope

 

[INTJ]

I believe many short range BR shooters don’t reload brass that clicks. Tony Boyer mentions in his book he shoots brass until it clicks.

I’m wondering why reloading brass that clicks sends the bullet to a different place than brass that doesn’t click.

I’m isolating, not much going on, tired of watching the garden grow

It doesn't, but when you are trying to shoot 2" groups at 1000 yds into a 3" X-ring, anything that upsets the rifle slows you down. When you slow down you may not get all your shots on the same micro condition, and thus you will not shoot 2" groups. Maybe not 3" groups either.....

 

[BoydAllen]

There are some technical details relating to clicks that have not been mentioned here. If a chamber is too close of a fit with an unfired case, assuming warm to hot loads, you are likely to have click issue early in case lives. Another issue is chamber coverage vs. die coverage at the bottom of the case. More often than not, die opening have generous chamfers. This combined with the thickness of the top of the shell holder limits how far down the case a die can size. If the chamber reaches farther down the case than the die there will be a very narrow band that is not sized. Finally, high pressure loads cause the diameter of the solid part of the head to slightly increase in diameter. Bottom line, the diameter of new brass, the design of the chamber, and the dimension of the FL die used with them, all need to be coordinated.

 

[Dusty Stevens]

Once brass clicks that means it has expanded a long ways if it didnt click the firings before that. Like tony mentions if you have some that click they wont be the same as the ones that dont volume wise

 

[BoydAllen]

Back in the day, some guys fell into the less clearance is better trap and ordered reamers that were just a little smaller at the .2 line for their 6PPCs. They quickly abandoned this strategy after finding out that they had many more problems with clicks. About that time, I did a little experiment with a test case that developed a click, through repeated use with hot load tests. Parallel with the CL I reduced the fired case diameter about .0015 forward of the extractor groove. It was a crude experiment but it demonstrated the idea. The click went away, and never came back through several hot firings. I have also successfully dealt with a click by using a die that reaches farther down the case.

 

[Alex Wheeler]

Every cartridge and brass manufacture has to be dealt with a little differently. You learn by trial and error how much smaller a die has to be than the chamber to ensure long brass life without issues. Once you know that, then you also know how much larger the chamber has to be over the virgin case head. A 6br needs very different dimensions in these areas than a 338 Lapua for example. Many have struggled with the larger cases because they apply the same chamber and sizing specs that works in the small stuff. I have made push through dies to salvage cases and it did work. But the best way in my opinion is to just get a good sizing die to begin with and you'll never have any trouble.