I've got a buddy looking for an AR-10 that can be bought face to face in Missouri. He is a bit paranoid about having an "assault rifle" on paper so he's looking for a private party sale.
Must be located in Missouri.
Hornady couldn't explain why they show 69.1 grains as max when Hogdon data has 65.0 as the max, producing 63,200psi when pushing a 165 grain bullet. Their (Hornady) data is what made me post the original question 🤷
🤣Yep. For practical purposes like hunting and plinking steel plates, I put far too much effort into finding a tenth of an inch here and there. For the potential PRS and F-Class rifles, it is worth it
I would think their manufacturing tolerances on each batch would keep each lot of powder within 2% of their baseline. They surely can't have a +/- 10% tolerance built into their quality assurance checks when testing their product.
I always shoot 2-3 ladders and stack the results. I chronograph each shot and put them on paper while doing so (100 or 200 yards). Once I think I have a couple of forgiving charge weights I'll shoot groups with those charge weights and then read the target (Jack Neary explains in interview with...
Agreed @jimh406
To add to my comment above, if I refer to nodes I am not referring to the so called accuracy node. I don't believe the gun will shoot more accurately in a flat spot but I do believe it can reduce deviation a bit across different conditions. For me if I find a flat spot where my...
Thank you for sharing this information and keeping the conversation going. I read about 2 pages into his responses after the video link. He makes some great points but I am not sure all of the controls are good enough to validate all of the data. I don't say that to discredit his work because I...
Your link takes me to a video I've watched. I understand his statistical analysis and it is definitely good information.
My original post was in regard to 3 books publishing vastly different max charge weights and how someone might use that information to determine a good starting point.
Why...
If everyone went up to SAAMI max and stopped, I don't believe we would get various published pressures. Isn't there 1 published SAAMI max for every cartridge?
The Lee book compiles data from several sources and there is quite a range in pressure for each max charge weight.
I agree but I will start a bit higher and work in .2 increments for the specific load I am working on. I definitely wouldn't advocate the idea of picking a random load but there is a lot to be gathered from the published max.
As a general reply to all and for further discussion - Many of the...
I find it interesting to compare book data sometimes. I work up loads for a specific rifle when I can, but I do produce reloads for general use (multiple guns). Sometimes the book data is halfway close with the max charge being 3 or 6% +/- and then there's data like this where it takes quite a...