Question on components per application

thedude824

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Oct 7, 2020
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I’m only using Lapua brass for my 338 Lapua. I’ve got an Annealeez on the way. My question pertains to various 308 loads.
I’m loading “bulk” 150 grain training ammo for the SCAR in range pickup brass that has been annealed, sized, and trimmed. I don’t expect better than 2 or 3 MOA from my 13” SCAR. Other loads are 125 grain controlled chaos for the SCAR (my real priority ammo), and 125 grain SST which is my training ammo to approximate the 125 controlled chaos in the SCAR.
I’m also loading 168 SMK for 600 and under in my 24” MRAD and 169 SMK for up to 1k in my MRAD.
My question pertains to brass. In addition to thousands of “bulk” cases, I’ve got 700 Federal cases from FGMM, I’ve got 500 NEW Lake City primed cases, I’ve got 500 once fired Norma cases, and 100 new Lapua cases. My thoughts were to use the Lapua for the 169. Originally I planned on using Lake City for the 168, but I keep hearing that Norma is better. The 125 grain rounds are more like 400 yards and in so I’m not sure if I should stick with Lake City for these? Or Federal? Or I’ve got more Norma loaded that I can practice with to produce more cases.
The Norma brass at this time was all fired from my SCAR. The FGMM was all fired from my MRAD.
My process is
Deprime, wet tumble without pins, anneal, lube, size with Redding type S bushing with expander ball removed, measure case, trim, chamfer, wet tumble without media, prime, graphite on case neck (should I also mandrel?) throw powder from Chargemaster Supreme, seat bullet with Forster micrometer die.
Thoughts? Suggestions?
I hope I’m not leaving anything out. It’s almost 2am.
I’m using a Wilson case gage micrometer and/or sinclair comparator.
The new primed brass will be run through the mandrel, graphite powder on the neck, throw powder, then seat.

I should add that the 150 grain bulk will not be loaded in that sequence since it will be loaded on a Dillon and I don’t trust the Dillon priming system. That ammo is the least of my worries, however.
 
I'll say I've not had federal brass hold up as well as others. I use it for low priority shooting and for when I know the weeds are gonna keep my brass.

Lake city brass tends to do well, starline too. Not lapua good, but good.

I'd use lapua to have a load for when you need to send the best. Maybe lake city and Norma for general mid tier stuff? And the mixed for close range and lower precision work?

Federal probbaly could fit in mid tier. I've had fine acceptable consistency from it, just seems to be softer brass than I'd like.

Keep in mind the varied case capacities.
 
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Per your request for thoughts, suggestions:

Do you're annealing before the first cleaning.

Don't use brass fired from one barrel in another. . . keep them segregated.

If you're going to use various brass for various applications, be diligent and keep good detailed records as to how they're being loaded and results. It always helps to do that anyway, but even more important when using various components.

Yes, IMHO you should also use a mandrel to get your neck tension you want to help with more uniform interference within the case's necks.

When using various cases as you are, be sure to measure and get some idea of the case volumes (after being fired) as there can be a significant difference that'll affect the performance from a particular load. For example, because Norma brass tends to have a little thinner case walls, the case volume is signfically more than LC brass that tends to have the thicker case walls (like 56.4 grs H2O for Norma vs 54.8 grs H2O for LC). Lapua brass and Federal brass tends to be in the middle of that range. Just within a particular head stamp, there can be a substantial difference in case volume from one lot of brass to the next lot.

As mentioned, use your Lapua cases of when you want the most consistent best results. They're high quality and very consistent within a lot compared to others. The Federal brass tends to have close to the same case volume and I've had excellent results there were as good as I got from Lapua. But the Federal brass tends to not last as long as Lapua brass. I've fired a lot of reloaded Federal brass and not had some of the problems some people claim to have (like with primer pockets getting too loose). I have a batch of Federal .308 brass that's been fired 10 time now and they're performing just fine. Having brass last, has a lot to do with how the brass in being sized and fitted to the particular chamber along with just how hot they're being loaded or not.

Since you have "thousands of bulk cases, like 700 Federal's, you can improve their consistency by weight sorting them into smaller batches as this will provide more uniform case volumes for your loads since there is some correlation between case weights and case volumes.
 
Since @straightshooter1 brought up weight sorting and there is a lot of recommendations and advice about not weight sorting I through this in. If you ar looking a real precision reloading for bench rest or F Class it isn't the most accurate way to sort. BUT when faced with trying to take a large bunch of Federal or really any other brand it is better than not sorting. There is a definite relationship between volume and weight. There is a variance due to the machining of the extractor grove and also the length of the case. There is also the possibility that the grade of brass is different between lots which have different densities.

The info below was obtained about 10 years ago and gives you some idea about the relationship of varying brass weight and volume. It was fired and resized then trimmed to all the same length.

Screenshot 2024-08-21 at 6.33.04 PM.png


1736509210829.png
 
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Since @straightshooter1 brought up weight sorting and there is a lot of recommendations and advice about not weight sorting I through this in. If you ar looking a real precision reloading for bench rest or F Class it isn't the most accurate way to sort. BUT when faced with trying to take a large bunch of Federal or really any other brand it is better than not sorting. There is a definite relationship between volume and weight. There is a variance due to the machining of the extractor grove and also the length of the case. There is also the possibility that the grade of brass is different between lots which have different densities.

The info below was obtained about 10 years ago and gives you some idea about the relationship of varying brass weight and volume.

View attachment 8588250

View attachment 8588251
Just to make a point about differences in case volumes from one lot to another, looking at this chart of various brands, note the difference between "Federal GM" and "Federal (Not GM). Just a few years back I called Federal and asked if there's a difference between their cases labeled "Gold Medal" and those that are not. He advised that they do not have separate production for GM brass or that there no sorting of brass that comes off the production line; they're all the same. Therefore, this chart shows how there can be a difference from lot to lot.

This difference in volume between lots can also be seen in data from Peterson Cartridge company's data:
Peterson Cartridge Co. Ballistician Testing Data.jpg
 
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