die / pressure and clickers

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So when we get bolt clickers and or a little hard bolt lift and there is no sign of pressure on the primer it's most likely your fl sizing die doesn't do the job correctly at the 0 .02line? Correction .200 line Assuming your head space is ok. Speaking of a 6BRA now, and most likely with all rifles.? If so this might prevent you from finding the top accuracy node?

ty have a great Holiday wk end.

 

[JEFFPPC]

I don't think it harms accuracy but it will sure upset your rifle in the bags and slow you down. In others words it will sure hurt your bench manners.

 

[BartsBullets]

So when we get bolt clickers and or a little hard bolt lift and there is no sign of pressure on the primer it's most likely your fl sizing die doesn't do the job correctly at the .020 line? Assuming your head space is ok. Speaking of a 6BRA now, and most likely with all rifles.? If so this might prevent you from finding the top accuracy node?

ty have a great Holiday wk end.

Often old brass in a new or different barrel is the culprit (chamber not being exactly the same).

Otherwise you get the click from shooting high pressure loads. It may not be instantaneous and instead happen over period of time. Which would explain why you’re getting a click with loads that aren’t hot.

Even a properly fitted full length die can’t stop you from getting a click. I’d suggest getting a small base die which will normally give you a couple of firings before it comes back.

Bart

 

[mikecr]

You could band-aid with greater sizing, but that isn't the root cause.
Popping extraction is due to an inference fit between the chamber and case (near web area).
The reason the issue is near web area is because of it's proximity to the breech, with the breech having lowest chamber support. That is, the chamber expands more at the breech, brass follows the chamber and then doesn't spring back enough to clear. Brass also has memory, and wants to go right back where it's been.
That's the full band-aid circle.

Sizing more equates to management rather than solution.
Solution always goes to root cause.
You 'could' do the following to reduce chances of popping extraction:
[The idea here being to prevent brass from ever yielding in that area beyond ~.0005"]
-Setup the chamber reamer no more than 1thou over NEW brass dimension near webs
-If you can, go to largest tenon (magnum dia), coned breech, finest threading(Like Savage)
-If in your planning, choose the smaller diameter of cartridge for capacity
-Pick the capacity of cartridge that provides what you need near but no more than SAAMI max
-Blade mic test for YOUR max, local, for near web expansion(runaway) as you go up in pressure
-Have a custom body die made that does NOT break elasticity of your brass near webs

 

[LC Tikka]

Someone please explain where the click comes from, the mechanics of the noise.
LC

 

[mikecr]

It's the bolt slapping the top of the action's extraction ramp.
So the case is not letting go of chamber on bolt turn until there is a lot of force. CLICK

 

[nwmnbowhunter]

Alex wheeler website has a video of it.

 

[nwmnbowhunter]

Here's the website. Video towards the bottom.

Videos | wheeleraccuracy

www.wheeleraccuracy.com

And why are clickers so bad? I found out this winter with my 300 prc. This load was 3 grains under faint ejector marks. I got one Clicker... but didn't really understand what it was. No ejector mark. Bolt wasn't stiff. This was next shot. Bolt was hard to lift and blew primer. I stopped shooting and measured my web and they had grown quite a bit from virgin brass. And these were loaded correctly. No chance of overthrow.

Don't mess with clickers... not cool.

 

[bozo699]

Someone please explain where the click comes from, the mechanics of the noise.
LC

Primary extraction
Wayne

 

[JMayo]

Clicker is just a name given to the sudden give of the case being extracted from chamber, not necessarily the sound.... could be called a snapper but that term is already in use

 

[BoydAllen]

You could band-aid with greater sizing, but that isn't the root cause.
Popping extraction is due to an inference fit between the chamber and case (near web area).
The reason the issue is near web area is because of it's proximity to the breech, with the breech having lowest chamber support. That is, the chamber expands more at the breech, brass follows the chamber and then doesn't spring back enough to clear. Brass also has memory, and wants to go right back where it's been.
That's the full band-aid circle.

Sizing more equates to management rather than solution.
Solution always goes to root cause.
You 'could' do the following to reduce chances of popping extraction:
[The idea here being to prevent brass from ever yielding in that area beyond ~.0005"]
-Setup the chamber reamer no more than 1thou over NEW brass dimension near webs
-If you can, go to largest tenon (magnum dia), coned breech, finest threading(Like Savage)
-If in your planning, choose the smaller diameter of cartridge for capacity
-Pick the capacity of cartridge that provides what you need near but no more than SAAMI max
-Blade mic test for YOUR max, local, for near web expansion(runaway) as you go up in pressure
-Have a custom body die made that does NOT break elasticity of your brass near webs

My experience, and that of others who are knowledgeable on the subject of "clickers" leads me to completely disagree with your first suggestion. Let me give you an example. A friend had a 6BR that had been chambered to fit Remington brass. He switched to Lapua and had the back of the chamber polished out so that new Lapua brass would chamber without resistance. Lapua brass is larger than Remington. When he tested loads with that chamber he was not able to load up to his expected velocities without extraction issues. After that, he had the barrel rechambered with a reamer that was dimensioned to accommodate Lapua brass with more clearance than his modified chamber had, and all of his problems went away. He was able to load to some screaming, and I think ill advised pressures/velocities with no problems up to the point where bolt lift and primer flatness told him to back off.

Another example was a project that I helped a friend with by doing the reamer ordering. He is and was a very meticulous reloader who wanted a .300 WBY chamber that was tight necked and throated short enough that he could touch the rifling with 180 grain hunting bullets retaining the ability to feed those rounds from the magazine. After the barrel was chambered and installed, we went to the range to do pressure testing, and took those loads up to a level of pressure that was well above what any routine load should be. To better get an idea of what was happening to the brass, I did all resizing of the single case that we used for all of the tests (loading at the range) with a one piece neck die, that happened to be perfect for the chamber's neck, giving perfect neck tension. After we got to the absolute hottest load that we would risk, after a minute to let the case cool, the case chambered easily. I believe that this was because I used the factory dimensions for the body diameters at the shoulder, head and for the belt.

In years past, in short range group shooting some tried tighter dimensions for the backs of their 6PPC chambers only to find that they had created a clicker problem. Returning to more generous clearances solved that problem.

 

[BoydAllen]

Clicker is just a name given to the sudden give of the case being extracted from chamber, not necessarily the sound.... could be called a snapper but that term is already in use

Actually, the term comes from the sound. If you are shooting factory chambers you may not have experienced it due to their more generous clearances. The force required at the top of the bolt opening, to break the fired case loose from the chamber results in an actual clicking sound, hence the name.

 

[ridgeway]

Since making a ring die to suit, I don't get clickers. Yes, bandaid...but with the (Harrells) sizing die and (Dasher) chamber I've been using since 09, it works. I am still using brass thats been around for years with well over 20 loads on them. I ring size them every time.

 

[JMayo]

Actually, the term comes from the sound. If you are shooting factory chambers you may not have experienced it due to their more generous clearances. The force required at the top of the bolt opening, to break the fired case loose from the chamber results in an actual clicking sound, hence the name.

Along with the cocking mine sounds a whole lot more than a click !
However, i don't really concern myself with the matter ....snap, pop, click .. all the same to me.

I believe it's @Uthink Uknow that makes a great pass through die.