Base to Ogive cull

[Sprayed99]

To those that sort, what range of measurement do you cull? Within half thou? Within one thou? Sorting through some Bergers I see the majority from .7105 to .7095 with the bulk being .7100. After a few hundred I have a handful 2-3 thou outside of the above measurement.

Thanks

Dan

 

[straightshooter1]

To those that sort, what range of measurement do you cull? Within half thou? Within one thou? Sorting through some Bergers I see the majority from .7105 to .7095 with the bulk being .7100. After a few hundred I have a handful 2-3 thou outside of the above measurement.

Thanks

Dan

Hmmm??? Interesting that there's a .010 spread for Bergers. I haven't use a LOT of Bergers, but the one's I've had have typically only been a .004 spread. And when there's only that much spread in a sample of 20 or so, I don't bother to sort.

But with my Sierra bullets, which I buy boxes of 500, when I see a spread of more than .004, I'll sort them by +/- .001, so that when I load my cartridges, I know there's only that +/- 001 variance in the bullet when measuring my seating depth. There's usually a couple outliers, which I'll only use for fouling shots, or cold bore shots, or some other use, kind of thing.

 

[Sprayed99]

The biggest spread I have is .003"... nothing near .010"

 

[FishDr]

To those that sort, what range of measurement do you cull? Within half thou? Within one thou? Sorting through some Bergers I see the majority from .7105 to .7095 with the bulk being .7100. After a few hundred I have a handful 2-3 thou outside of the above measurement.

Thanks

Dan

How are you measuring this? If measuring with a comparator and calipers, you aren't getting consistency in measurement of +/- .0005 with that tool. If I were getting that kind of consistent measurements, even with a caliper and comparator, i'd just run em. I can't shoot that difference.
YMMV

 

[Coyotehill]

So just my opinion, if I understand. You are measuring the flat base to the ogive w one comparator on the caliper? Really need two comparators, one on each jaw of the caliper. Then you are measuring the length of the bullet that will contact the lands. If that is .010" different you will notice. From the flat base to ogive would only effect internal case capacity of a loaded round.

 

[Sprayed99]

How are you measuring this? If measuring with a comparator and calipers, you aren't getting consistency in measurement of +/- .0005 with that tool. If I were getting that kind of consistent measurements, even with a caliper and comparator, i'd just run em. I can't shoot that difference.
YMMV

This is irrelevant to my original question but thanks for the response

 

[Sprayed99]

So just my opinion, if I understand. You are measuring the flat base to the ogive w one comparator on the caliper? Really need two comparators, one on each jaw of the caliper. Then you are measuring the length of the bullet that will contact the lands. If that is .010" different you will notice. From the flat base to ogive would only effect internal case capacity of a loaded round.

you are thinking about this way too hard. No I'm not meauring bearing surface. I'm trying to determine seating depth from the lands and removing variables from my seating process. I have an issue with seating irregularities and this is one rabbit hole that was worth exploring to me.

 

[spife7980]

I have an issue with seating irregularities and this is one rabbit hole that was worth exploring to me.

Dollars to donuts that your seating inconsistencies are due to the brass and not the bullet.

Ive tried to sort by this but when you sort in the sub .001 lots and you come back and measure the next day half of them need to switch tubs. And they all end up seated the same.


Ive posted this before but its the last sampling after which I said, ehh, not worth the time.

They all seat the same still.

 

[Sprayed99]

Dollars to donuts that your seating inconsistencies are due to the brass and not the bullet.

Ive tried to sort by this but when you sort in the sub .001 lots and you come back and measure the next day half of them need to switch tubs. And they all end up seated the same.


Ive posted this before but its the last sampling after which I said, ehh, not worth the time.
View attachment 7457288
View attachment 7457289
View attachment 7457290
View attachment 7457292

They all seat the same still.
View attachment 7457293

Thanks for the data, it seems your seating is far more consistant than mine, but sorting did fix my problem. About every 8-10th rd I would have a casehead to ogive varaiance of .003 to .006 and that isnt something I like. After sorting through 500 a little more than 10% shared this varaiance and once completed the spread was as wide as .008 but most inside of .005.

I proceeded to seat 40 cases last night and the numbers look similar to what you have shown above.

I have no idea if this helps me in any way, but its my time and I own it and I wanted to investigate.

Thanks for your response.

 

[Steel head]

To those that sort, what range of measurement do you cull? Within half thou? Within one thou? Sorting through some Bergers I see the majority from .7105 to .7095 with the bulk being .7100. After a few hundred I have a handful 2-3 thou outside of the above measurement.

Thanks

Dan

Did you know a national Top level f class shooter doesn’t sort Berger’s base to ogive?

Erik cortina sorts them tip to base but that might be to get consistency tipping.

I certainly don’t sort the 190LRHT for ELR nor see the need to do so.

 

[Sprayed99]

Did you know a national Top level f class shooter doesn’t sort Berger’s base to ogive?

Erik cortina sorts them tip to base but that might be to get consistency tipping.

I certainly don’t sort the 190LRHT for ELR nor see the need to do so.

Thanks for your concern, but once again this has nothing to do with my original question.

 

[FishDr]

This is irrelevant to my original question but thanks for the response

Here's you're original Question...

To those that sort, what range of measurement do you cull? Within half thou? Within one thou? Sorting through some Bergers I see the majority from .7105 to .7095 with the bulk being .7100. After a few hundred I have a handful 2-3 thou outside of the above measurement.

If you are getting +/-.0005 (i.e. w/in a .001 spread), run em. Even if your measurements are not perfect.
Spife gave you the same answer, with data.
So did SteelHead - you're overthinking it.

You' said " About every 8-10th rd I would have a casehead to ogive varaiance of .003 to .006 ". Is this perhaps a compressed load, or close to it? I would check to make sure you have consistent neck tension (likely not the problem), and that you have a seater stem that works well and consistently with the bullet you are seating. This is more likely a seating stem/pressure/neck tension issue than a bullet variance problem.

Just thinking and trying to help.

 

[Sprayed99]

Here's you're original Question...

If you are getting +/-.0005 (i.e. w/in a .001 spread), run em. Even if your measurements are not perfect.
Spife gave you the same answer, with data.
So did SteelHead - you're overthinking it.

You' said " About every 8-10th rd I would have a casehead to ogive varaiance of .003 to .006 ". Is this perhaps a compressed load, or close to it? I would check to make sure you have consistent neck tension (likely not the problem), and that you have a seater stem that works well and consistently with the bullet you are seating. This is more likely a seating stem/pressure/neck tension issue than a bullet variance problem.

Just thinking and trying to help.

Load isn't anywhere near compression, and I have used several other bullets with the same seater/stem without issue. I seem to have isolated the issue and you can actually see the difference in OAL with the naked eye. I have never sorted Bergers and I believe this may just be abnormal lot. I figured the -/+ .001" bullets were GTG been doing this for long enough to know that. The question is more so where do you draw the line? .002" .003"...etc, but my fault for not being clear on that.

Spife gave me an awesome bit of info as I was going to head down that path, but got lucky and found the issue.