New 30br difficulty(update with another?)

[gunsandgunsmithing]

Nothing to do with your problem but it looks like you turned much farther into the shoulder than they recommend. I always wondered where The theory originated that you should turn lightly into the shoulder. I see no purpose for going into the shoulder at all? Opinions welcome.

The donut is a reason but I think it's more often a case of people trying to be too perfect a lot too. If the bullet doesn't contact the donut, let it be there..imho. But there are others that feel differently and to get as much as possible out of it, ya need to cut into the shoulder a bit, especially on necked UP cases. We are at times our own worst enemy in this sport..fwiw.

 

[mudduck]

Little update, I fired the 26 I had loaded to break barrel in and resized the few I had marked as being hard to chamber. After resized they seem to be fine with no issues with no bullet anyway. Another question I have though should I anneal after have the 1st fire on them? I noticed that a bullet is pretty snug when trying to insert in fired case. I don’t have an any experience with a tight neck is the reason I ask on annealing them.

Here’s a pic of the first 26

 

[565tinfitter]

I wouldn’t anneal them until they’re fully formed. It usually takes 2-3 firings for them to achieve being truly formed to the chamber, this includes the neck.

I also believe that trying to adjust your sizing die at this time is wasted. This is because if you get your die adjusted while fireforming your brass the die will have to be readjusted. The reason is when you decide to begin annealing your brass its softened state will cause your brass to be sized too much. In my experience I have just neck sized the first 2-3 firings depending on how much powder you’re using.

If you have a loaded round diameter .002” smaller than your chamber dimensions then your neck should be fine. You can run a nylon brush through the necks of the fired cases to remove any residual powder fouling to get a better feel of bullet clearance. Ultimately the bullet should pass through a fired case without resistance when they are fully formed. I believe there’s some thinning of the necks after being turned initially and fired several times. It seems that one can get a false reading of neck clearance after first firing. We then go and turn the necks again only to find we are now thinner than the initial measurements we were hoping for.

 

[AlNyhus]

I noticed that a bullet is pretty snug when trying to insert in fired case. I don’t have an any experience with a tight neck is the reason I ask on annealing them.

A couple of questions:
-What is the chamber neck diameter?
-What do the necks measure with a bullet seated?

 

[mudduck]

.330 I think have to ask smith. Just under .328 with bullet seated I believe need measure again

 

[Jayplace]

If your cases can now be easily chambered after firing, I would say the case necks were not perfectly straight in the beginning and the firing straightened them.
I don't think that is unusual. 50,000 psi makes the brass fit the chamber and can smoothe out irregular waves in brass

 

[AlNyhus]

.330 I think have to ask smith. Just under .328 with bullet seated I believe need measure again

Though .330 is the most common chamber neck dimension, double check with who chambered the barrel...it's unusual that the barrel isn't marked with that info. Are you checking the necks with a good .0001 micrometer or a dial caliper?

 

[Webster]

I wouldn’t anneal them until they’re fully formed. It usually takes 2-3 firings for them to achieve being truly formed to the chamber, this includes the neck.

I also believe that trying to adjust your sizing die at this time is wasted. This is because if you get your die adjusted while fireforming your brass the die will have to be readjusted. The reason is when you decide to begin annealing your brass its softened state will cause your brass to be sized too much. In my experience I have just neck sized the first 2-3 firings depending on how much powder you’re using.

If you have a loaded round diameter .002” smaller than your chamber dimensions then your neck should be fine. You can run a nylon brush through the necks of the fired cases to remove any residual powder fouling to get a better feel of bullet clearance. Ultimately the bullet should pass through a fired case without resistance when they are fully formed. I believe there’s some thinning of the necks after being turned initially and fired several times. It seems that one can get a false reading of neck clearance after first firing. We then go and turn the necks again only to find we are now thinner than the initial measurements we were hoping for.

I would think annealing would help the case form properly. Properly annealed brass is not softened very much. Some people seem to think annealing makes the brass very soft, it doesn't. Look at the hardness numbers on the AMPS website.

 

[gunsandgunsmithing]

I would think annealing would help the case form properly. Properly annealed brass is not softened very much. Some people seem to think annealing makes the brass very soft, it doesn't. Look at the hardness numbers on the AMPS website.

.....if done properly. I do believe a fair number of people tend to over anneal a bit...fwiw.
Not enough(generaly) to ruin brass but enough that it can be a bit soft and maybe a little further down than perfect. I've annealed in the past but I don't do it regularly anymore. I get great accuracy and brass life without it. It seems to have become a mandatory tool or step to some but my results just say otherwise. Maybe I'm doing something different or whatever...maybe it truly is a necessary step to some. Just not me, for whatever reason.
Pressure is by far the determing factor to brass life with my procedure, dies, chambers, etc.
I can kill brass in a firing or two or I can go 50 plus firings but it's virtually always relative to how hot I load and primer pockets

 

[mudduck]

Though .330 is the most common chamber neck dimension, double check with who chambered the barrel...it's unusual that the barrel isn't marked with that info. Are you checking the necks with a good .0001 micrometer or a dial caliper?

Measurements with mic.

 

[searcher]

Nothing to do with your problem but it looks like you turned much farther into the shoulder than they recommend. I always wondered where The theory originated that you should turn lightly into the shoulder. I see no purpose for going into the shoulder at all? Opinions welcome.

The "logic" there is to "hold off" doughnut formation. There are a lot of guys who swear by doing so when rounds are seated below the shoulder/neck junction. Personally, I like to keep my bullets out of that area - but in some loads/bullets it is unavoidable. The inside neck cutters seem to be the best ticket for keeping those maintained, if not with a reamer?

 

[searcher]

.....if done properly. I do believe a fair number of people tend to over anneal a bit...fwiw.
Not enough(generaly) to ruin brass but enough that it can be a bit soft and maybe a little further down than perfect. I've annealed in the past but I don't do it regularly anymore. I get great accuracy and brass life without it. It seems to have become a mandatory tool or step to some but my results just say otherwise. Maybe I'm doing something different or whatever...maybe it truly is a necessary step to some. Just not me, for whatever reason.
Pressure is by far the determing factor to brass life with my procedure, dies, chambers, etc.
I can kill brass in a firing or two or I can go 50 plus firings but it's virtually always relative to how hot I load and primer pockets

I think everyone who has annealed learns a thing or two about getting brass too hot - first purple - then a warp - then disfigured cases. Ha!