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how do you measure your loaded ammo?

 
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  #1  
Old 09-07-2009, 04:24 AM
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how do you measure your loaded ammo?

i have been measuring my reloads with a caliper. just going base of the case to the bullet tip. i have read this is not as accurate as using a bullet comparator. so i went and bought the hornady bullet comparator, well how do i use the lengths from my old tip to base method with this thing?
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Old 09-07-2009, 05:46 AM
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Re: how do you measure your loaded ammo?

bullet tip lengths vary a fair amount , even in the same box . so it is not very accurate to measure off the tip . what you need to do is take a couple of your reloaded rounds that are the tip to base length you want , and just measure them with your new tool . be sure to use the correct caliber insert in the tool . this new measurement is from the base to the ogive and will be much more consistent . I keep both lengths wrote down . Jim
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Old 09-07-2009, 08:43 AM
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Re: how do you measure your loaded ammo?

+1 JIMBIRES
In the future adjust your seating depths as measured high on the ogive. Log the resultant OALs to 'OGV'

I know people like the Stoney Point & clone caliper attachments, but I found readings more consistent with the Sinclair comparator nut. This I suppose, because all is floating.
http://www.sinclairintl.com/product/...et-Comparators

Last edited by Mikecr; 09-07-2009 at 08:47 AM.
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Old 09-07-2009, 02:03 PM
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Re: how do you measure your loaded ammo?

I bought the Sinclair bullet comparator and went through the same thing.

My level accuracy at 100y is that any .5" group is perfect and any 2" group is too bad to accept.

So measuring to the tip is good enough for me.

I do use the bullet comparator for something else; the compare headpace on shoulders of fired brass. I put the comparator on the granite surface plate and the brass on that. I then come down with a height gauge for a measurement. This also shows how springy the action is.
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Old 09-07-2009, 04:24 PM
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Re: how do you measure your loaded ammo?

I'm convienced too many of us are agonizing over OAL far more than it needs, perhaps especially any small differences between reading off the bullet meplat or ogive. Of corsre the tool makers will gladly sell us any special tools we wish. I have three of them for reading off the ogive but have reverted to reading off the meplat for most bullets, that actually works just as well.

IF/when we can CONSISTANTLY get groups below .5 MOA it MIGHT be helpful to be more precise. But few of us will ever see three consecutive five shot .5MOA groups! I rarely do.

Last edited by boomtube; 09-07-2009 at 05:19 PM.
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Old 09-07-2009, 04:54 PM
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Re: how do you measure your loaded ammo?

Alright, I'm pretty sure you're both stoned...
Have either of you developed a load in your lives?

OAL can very important to accuracy. Certainly you must know this.
If you aren't setting it carefully, then it really doesn't surprise me that 1/2moa seems like a big deal..

YZM19 you're on the right path. When you find the sweetest performing OAL based on your gauge readings, you can set your seating to reproduce it for most of the barrel's life.
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Old 09-07-2009, 06:18 PM
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Re: how do you measure your loaded ammo?

Quote:
Originally Posted by Mikecr View Post
Alright, I'm pretty sure you're both stoned...
Have either of you developed a load in your lives?

OAL can very important to accuracy. Certainly you must know this.
If you aren't setting it carefully, then it really doesn't surprise me that 1/2moa seems like a big deal..

YZM19 you're on the right path. When you find the sweetest performing OAL based on your gauge readings, you can set your seating to reproduce it for most of the barrel's life.

I handload for 19 Badger .222, .223, 22-250 .243, 25acp, 6mmBR,.243Win, 25/35, .250/3000, 257 Roberts AI, 260Rem, 6.5x55, 270, 7x57mm, 7mm Rem mag, 32acp, 32sw, 32S&WLong, 32-20, 30 Mauser, 7.62x25mm, 30-30, 303Sav, 300Sav,.308, 30-06, 300 Win Mag, 7.5 Swiss,7.62x39mm, 303Brit, 7.62x54R, 8x57mm, 338WM, .380, 9x19mm, 9x23mm, 357Sig,38special, 357 mag, 38sw, 40sw, 10mm, 10.4mm, 44 mag, 45acp, 45Super, 460 Rowland, 45acpRifle 45Colt, .410, 45/70, and 12 ga.

I own reamers in 17M2, 22LR, 223 .250" neck, 6MMBR .272" neck, 243, 257RAI, 7mmRM, 30 Mauser, 308, 300WM, 7.62x54R, 338WM, 9x23mm, 357Mag .380 neck, 45acp .471" neck, and 12 ga Remchoke.

I own ~50 load books, but don't use them anymore, I make up my own loads.

I have gone to the range 70 times over the last 6 years, and written up a detailed range report each time. I just counted the range reports

I can imagine that precise OAL has been found by someone else, sometime, to affect accuracy to the point a difference can be detected, but I can't.
All my experiments show that jammed into the lands is more accurate, and how far jammed in does not matter enough to measure.

I have s***canned precise OAL, along with weighing brass and turning necks.
There was just no pay off for the trouble in my experiments.

I find where the bullet first gets marks from being jammed into the lands.
I find where the bullet gets stuck in the lands and the case extracts with the bullet left behind.
I then pick some OAL in between.
No great seating accuracy needed to find such a spot.
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