Bryan specially cited Hodgdon Intense Sequence powders as on the list of least temperature sensitive powders he’d used. He also built it distinct that no powder is completely insensitive to temperature.
I then used the Prometheus Gen II Powder Scale to throw all fees. I have checked the Prometheus a number of moments on a large-conclusion Sartorius analytical scale, and each time it confirms what I previously know: the Prometheus is accurate all the way down to one kernel of powder! The Prometheus isn’t low-priced (starts off all around $3,800), but should you reload up to I do, it may save a lot of time, and allows me to go to the assortment as opposed to sitting all-around loading all day long.
I opened up the Utilized Ballistics Analytics software package, and ran the numbers. I used the six.5×forty seven Lapua muzzle velocities for the Berger 140gr Hybrid from our examination, and also used the Custom Drag Curves for that bullet (which in my encounter make the predicted ballistics align Pretty closely to the true-earth success). I’m not sure what focus on distance you shoot at, but we’ll think an even a thousand yards to actually make any variations in muzzle velocity jump out. Here's the results:
They have not taken them off their Web-site and possess no mention of them becoming discontinued on web site? In which you listen to this? I googled it and only point that arrives up Is that this publish?
I agree that a load that produces the ideal SD’s doesn’t essentially suggest it is going to produce the best teams, and vice versa. I believe a single is a lot more related to scenario layout, powder, and interior ballistics, and the other is connected with barrel harmonics and obtaining that “accuracy node.” In prolonged-assortment taking pictures, I place more pounds on minimal SD’s and great group dimension (prefer beneath 1/2 MOA), more than super-very small group measurement and higher SD’s. (Honestly, with the Prometheus getting low SD’s is quite easy with most powders.
I assumed it was an excellent posting. They went to some fantastic size (like leasing a freezer truck) to test to get it ideal. That makes imr 7977 in stock it much more discouraging the post is lacking the charts and photographs. It seems like an individual copy-and-pasted it in from A different source and the pictures weren’t integrated.
For his pistol it was about 3.5% and for and Vaughn’s 270 Winchester rifle, it had been about a further three%. Presumably a alter in barrel length would influence the quantity. The radar trace showed the velocity rise and then get started the normal drop owing to tug very Obviously. My assumption is this article-muzzle acceleration would idiot a Magnetospeed into reading through a little bit very low, as the bullet wouldn't be very accomplished accelerating when it crossed the 1st sensor. I examine someplace the Army discovered muzzle blast impact in artillery to become completed in the main eleven calibers further than the muzzle, but don’t remember Studying the barrel length(s) in calibers or peak-to-muzzle force ratios they identified it for.
And dang, that Harold Vaughn Rifle Accuracy Points is a superb reserve, isn’t it?! I bought numerous textbooks like that every one concurrently, and I was slowly but surely making my way through all of them … but that one particular is a thing Exclusive. I want I could’ve collaborated or at the very least had a good conversation with Mr.
For $300, the MagnetoSpeed is a large price, And that i’ve under no circumstances viewed it not receive a reading with a shot. I Individually consider the LabRadar might be additional correct, it’s a lot less difficult and quicker to set up, and it doesn’t dangle off the barrel so it received’t influence your shot. Whenever you’re screening things such as I are, that may be vital.
Many thanks Cal, It’s by now preordered And that i’m genuinely seeking forward to beeing stunned! Takes place to be perfectly timed, considering the fact that I’m at the moment thinking about investing dollars on a far more innovative annealing setup, and It might be amazing imr enduron powders to help make this conclusion based upon right facts. Expertise is power, they are saying…
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That’s why I by no means did a article about it. Really to achieve any common reality you’d will need to check over numerous many Each individual primer and I just don’t hold the time to try this. It’s be another intriguing experiment!
That’s precisely what I’ve study. There might be A different Australian powder that you just’re referring to, but that just sparked my memory.
Attention-grabbing. I guess I haven’t heard of that. Many thanks for sharing. It’s in all probability a imr 7977 in stock reasonably full-featured engine if it's got a spot to account for this.