OCD ammo checklist - Printable Version

OCD ammo checklist - Printable Version

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OCD ammo checklist - Zeneffect - 10-15-2023

Cases sorted by volume
Resized Cases within +-.0005
Cases trimmed chamfered, deburred on 3 way cutter to within +-.00025
Neck wall trued up with skim cut
Flash holes cleaned up
Case runout at neck and body sorted, all greater than .0005 rejected
Bullets weight sorted
Bullets bto sorted
Neolube inside case necks
Powder charge is within +-.01gr

Sort primers?
Uniform primer pocket?

Anything missing?

Only doing 50 for the shut up and shoot match next month so I can spend more time in prep and have a bigger lot to pick from. 20 more will be made for load verification. Going to run the 105gr sierra + power pro varmint load and see if I can push the precision harder though I may fall back to staball match as it just produced better groups with this powder, at the expense of almost 100fps... varmint sized targets so excess energy for knock down not needed, precision and accuracy required. Gonna run the uintah bolt ar15 just because I can, and it's just flat out set up to do exactly this kind of work.

OCD ammo checklist - biodsl - 10-15-2023

No...I'd say you pretty much have it covered!

OCD ammo checklist - BlogSarge - 10-16-2023

But it is CDO, alphabetical like it should be!

OCD ammo checklist - LRRPF52 - 10-16-2023

I think youre now ready for the next step:

Powder kernel uniforming.

[Image: unipowder07.jpg]

Quote:Proof That It Works
All this time-consuming work to drill holes in individual kernels would be pointless, of course, if it did not produce meaningful accuracy gains. The proof, as they say, is on the target. We were curious to see if our uniformed powder kernels would out-perform unmodified kernels, so we did some field testing. We prepared two batches of 6mmBR ammo in Lapua brass, with full case prep, and bullet base to ogive sorting (we wanted to eliminate as many variables as possible). Bullets were Lapua 105gr Scenar Ls, which proved to be some of the most consistent projectiles weve ever measured.

One set of rounds was loaded with a carefully-weighed charge of unmodified kernels. Case to case charge weight was held to .05 grain (half a tenth uniformity). Then we prepared a second batch of cartridges with uniformed kernels, using the exact same charge weight, also held to .05 grain (half a tenth) tolerances. We took these rounds to the range, and did a round-robin test at 800 yards, shooting one of each type in sequence (i.e. one uniformed on right, then one non-uniformed on left) until we had two 10-round groups. The test was done with a rail gun fitted with a 1:8? twist, 28? Krieger 0.236? land barrel. The uniformed-kernel ammo was shot at the right diamond, while the non-uniformed rounds were shot at the left diamond. Conditions were good, so we simply held center on every shot. No attempt was made to correct for wind as our primary concern was vertical dispersion.

OCD ammo checklist - LRRPF52 - 10-16-2023

[Image: gd50301.jpg]

Powder Kernel Uniforming A Breakthrough
We now have the tools and the methodology to resolve the inherent uncertainty in individual kernel weight. Using the new technique of powder kernel uniforming, first pioneered by German Salazar, we can now, for the first time, ensure that every kernel of powder that goes into a cartridge is virtually the same weight the same, in fact, within 0.01 grain (one-hundredth of a grain) TOTAL spread.

For a reloader looking to achieve perfect load weight uniformity, powder kernel uniforming offers the ultimate control over powder weight. The method we devised to uniform individual kernels consists of kernel core-drilling. The propellant we chose for this kernel-uniforming test was a new prototype (not yet commercially available) EuroChemie RL X propellant. This was chosen because it offered relatively large, can-shaped kernels that could be drilled relatively easily.

Rolleyes

OCD ammo checklist - Zeneffect - 10-16-2023

There are many things I question about drilling holes in powder, first and foremost is is this a joke?

Second, if you are removing 30% of interior mass without controlling outer dimensions, what is the point?

When you need to add 30% more to make up same weight, how does that fit in a case?

How does a kernel hold up after seating? I would imagine fractures etc....

In all, looks like either a joke or a scam to me. If 1 kernel weighs .006gr and you need 28+gr.... its better use of time trying to flap your arms really hard and fly.

OCD ammo checklist - OLDCOOT - 10-16-2023

Yep, it's a joke. Rolleyes

OCD ammo checklist - Growler - 10-16-2023

Ill bite, but with a Pareto twist
If you could only do 2 of these, which two?

Cases sorted by volume
Resized Cases within +-.0005
Cases trimmed chamfered, deburred on 3 way cutter to within +-.00025
Neck wall trued up with skim cut
Flash holes cleaned up
Case runout at neck and body sorted, all greater than .0005 rejected
Bullets sorted: weight
Bullets sorted: Base to Ogive
case neck lube
Powder charge within +-.01gr

Which two of the above, in your experience, give the greatest result for time spent?

OCD ammo checklist - Harpoon1 - 10-16-2023

Figure 14 on page 13 has cured me from getting too wound up over charge weight precision/consistency. Too small of a sample size was usually the culprit!

https://storage.googleapis.com/wzukusers/user-33607572/documents/7f15a36e4a52403d9ac4e42ae6342116/The%20Tyranny%20of%20Statistics.pdf

OCD ammo checklist - grayfox - 10-16-2023

LOL!!! that micro drilling is a total hoot!!!

I guess if it were me (not being ocd), seems as though you are deep into the area of "diminishing returns".
The amount of prep you show seems more in line with a perfectionist-competitor where shooting into the 0.3's is not good enough.
But then such a shooter would not be shooting grendel. It would be a $5k-$10K rig in a target rifle, for benchrest or such, 1000-1500 yd capable outfit.
So if you're going down this road, it is impressive, but too deep into diminishing return-territory for me.
I'm still the biggest variable in the shooting equation. If I could stay in the 0.7-0.5's each and every time, then maybe I might see what else I could do.

OCD ammo checklist - Zeneffect - 10-16-2023

If I were to pick only 2. Powder weight and neolube. Powder to keep the es and sd as low as possible while staying in the accuracy sweet spot.

Neolube is a band-aid and a half and can make a crappy load shoot decent, and a decent load shoot awesome. Between keeping powder weight consistency tight and a more even seating force from the neolube (plus cold weld prevention) the group size will shrink the most. The rest give you fractions of fractions... but it all adds up. Given the low volume I am working with, it's worth doing.

.25 moa or better is needed for the games I'm playing so diminishing returns is fine so long as it's not costing excessive amounts of money.

OCD ammo checklist - LRRPF52 - 10-16-2023

Zeneffect Wrote:There are many things I question about drilling holes in powder, first and foremost is is this a joke?

Second, if you are removing 30% of interior mass without controlling outer dimensions, what is the point?

When you need to add 30% more to make up same weight, how does that fit in a case?

How does a kernel hold up after seating? I would imagine fractures etc....

In all, looks like either a joke or a scam to me. If 1 kernel weighs .006gr and you need 28+gr.... its better use of time trying to flap your arms really hard and fly.

You have to use the special Swiss micro drill.

April 1st article from Accurate Shooter bulletin. Cool

OCD ammo checklist - Zeneffect - 10-17-2023

Meplat uniforming... but plastic tip so... ???