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Old April 11th, 2019, 12:02 PM #1
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Comparing bullets a technical discussion

Lets say I have 500 Bullets ( projectiles, not cartridges) from Fred's ammo shack. I also have been bequeathed 500 of the same caliber and weight bullet by my Father in law, who is recently deceased. However, his will required me to take half and give the other half to my worthless sister's cousin Janine

How will go about determining which projectile will be more accurate at long range? How would I determine whether to give 250 from FIL or my stash? should I look at:

consistent length/diameter/profile?
coinsistent weight"
something else?

I cannot shoot them to test, because the will states I must forward within 24 hrs.

BTW, my FIl is still alive and I don't have any worthless relatives whatsoever. I'm just trying to be entertaining while gathering technical information.
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Last edited by ras_oscar; April 11th, 2019 at 12:03 PM. Reason: edited for splng and to run in the allotted time
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Old April 11th, 2019, 12:17 PM #2
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Without shooting them it's a SWAG...I guess measuring and weighing them would tell you something but shooting them is the only way to know for certain.
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Old April 11th, 2019, 03:56 PM #3
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http://www.bulletinspector.com/vern_juenke_history.htm

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Old April 11th, 2019, 04:38 PM #4
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If the lot of 500 is different enough to be of different accuracy, give her the whole 500.
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Old April 12th, 2019, 05:29 AM #5
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Ballistic coefficient

In ballistics, the ballistic coefficient (BC) of a body is a measure of its ability to overcome air resistance in flight. It is inversely proportional to the negative acceleration — a high number indicates a low negative acceleration.
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Old April 12th, 2019, 08:42 AM #6
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What would your father in law want you to do given this sticky widget? ... yeah we know what he wrote but what might he have intended, wanted everyone to be included vs who would most appreciate any given item. Sorry for your loss.
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Old April 12th, 2019, 10:19 AM #7
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In my own testing, I certainly have determined that projectile quality/consistency is a key indicator of accuracy.

I have gone as far as to weigh and load different lots based on their weight and found that this was somewhat less important. Weighing 500 77 SMKs gave a nice distribution around 77, but the variation in accuracy between the 77s I loaded and the 77.8s for example was negligible.

I think the concentricity of the core and jacket is important among other factors, but of course that would require destructive testing.

The differences between brands is more important. Xtreme bullets versus Blitzkings for example. A 55grain Blitzking (24 cents) is crazy accurate versus the 10 cent Extreme bullet. There ain't no free lunch.

All this assumes careful trickle charged powder and consistent cases etc.

To answer your question, use a reference load from your bullet stash of known quality and the same weight as the bequeathed bullets, match the load with some Fred's bullets, and see how you do. I have also done groups of loads marked on the bottom of the box so that I wasn't biased during the shoot.

A couple of my reference loads (work up to these if you decide to use them)

Match Rifle: 77 grain SMK 24.0 Varget CCi primer
Carbine 1:8 55 Grain Blitzking 24.7 ARCOMP CCi primer
Garand : 168 SMK 46.0 4895 CCi primer
Springfield: 155 SMK 46.0 4895
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Old April 13th, 2019, 08:41 AM #8
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I would look at the unit cost of said projectiles. If you're talking about 10-20 cent bullets, and you only have 500 of them, you're talking about $25-$50 worth of bullets. Probably not worth your time and effort other than to be able to say that your worthless cousin's ex-sister got the maybe crap bullets she deserved. Having sufficient quantity could be your factor to decide it is worth your time to determine. If, on the other hand, you're talking about projectiles that go for $1-$2 per unit, it becomes a bit more interesting and easier to decide the endeavor with only 500.

So, your takeaway from this post should be: consider the total value of said projectiles first. If the value is worth your time and effort, get out your scales, calipers, micrometers, and whatever else folks here recommend. I, on the other hand, would simply keep the kind that I've shot before (or bought myself) and give the other stuff away.
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Old April 13th, 2019, 08:50 AM #9
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Assuming a relatively equal lot of 1000 bullets(500 from your purchase, 500 bequeathed), I. E. They are all LRN, or JHP, or FMJ or TMK or LMNOP....(I made that last one up, my we do love us some acronyms)

Then just give him 250 of whichever you choose. Because at that point the bullet matters less than how it will be used
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Old April 14th, 2019, 06:34 PM #10
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The answer is easy, pick a 500 lot at random and send it. The most accurate bullet
for you is determined by empirical testing. If you want to (or can) determine any
differences you can check for consistency in ogives within a 500 lot of bullets, or
measure to .0001" for consistency in diameter. In the end, there is no way to
discover any accuracy differences except by load testing, in a proven accurate
rifle, using a proper bench rest technique, use of wind flags, maintaining
proper mental focus, keeping records - hopefully, from a statistically large
population sample of groups. Tough row to hoe in 24 hours, so ...pick one lot to
keep and Fed Ex the other. Dr. Bob
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