Wound’t magnetospeed readings be normally a bit highter, because it steps the relative pace between exiting bullet and recoiling rifle, instead of the relative speed amongst bullet and “earth”?
Anyone try out 4955 in the 6mm creeds? If that is so which kind of velocities are you observing? I discovered a bunch regionally and im in some a bind for powder.
Hello. I locate your posts extremely usuful and applicable. Could you give us a better indication of how the Magneto Velocity chronograph measured up on the doppler radar?
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From what I can inform thus far, you can end up getting a full to compressed load. The powder compressed less difficult in comparison to the lengthier skinnier shaped powders. Metered uniformly, threw very well and trickled very well. I’ve a batch loaded up to test for velocity, precision, and stress signs, but haven’t shot them yet. That's The main reason for four stars as I haven’t shot it still, but if my loads appear close to revealed outcomes, I hope to get happy.
Here is the to start with in the more recent enduron powders I’ve labored with. I purchased it simply because I couldn’t discover the powder I want for 3006 rounds there are recipes shown for 3006 and am serious about the temperature insensitivity and anti fouling Qualities. It is actually a short Unwanted fat cylindrical condition, instead of the prolonged skinny cylindrical extruded powder I’m used to observing.
Yet another 10 loaded rounds from Every group have been brought as much as 140° File by imr 4955 load data exposing them into a heating blanket. This could sound extreme, however, if you permit your box of ammo out during the Solar or around the dash of your respective truck … it may get around this temperature.
A few imr enduron powders things: One is the fact that soon after I ordered my very own IMR 4955 duplicate in the Labradar instrument, I spoke for any time to the U.S. seller, and he explained he had finished The 2-unit take a look at with, IIRC, a 9 mm bullet. He said The 2 units have been inside one fps of each other other than in the longest vary, the place he would occasionally see two fps disagreement.
So you’re place about Varget remaining much more steady in that decreased temperature vary is a superb one particular. You unquestionably have an eye for detail! I hadn’t manufactured Observe of that, so I respect you pointing it out.
One other matter is an issue: Was the 2 fps looking through variation Along with the Magnetospeed persistently increased to the Labradar? 5 or 6 a long time ago, a retired radar engineer who had built a Doppler device for his particular use shared some output from it with me that he’d designed capturing a 40 S&W pistol. Its output was a steady velocity vs. time plot instead of velocity vs. distance. It confirmed a little something Harold Vaughn experienced shown using a magnetometer rig in his book, Rifle Precision Info, about fifteen yrs in advance of him, and that is that more than the very first few calibers of bullet vacation outside of the muzzle, muzzle blast even further accelerates the bullet slightly.
You’re proper. The loads weren't tuned to an accuracy node for your test rifle. In this article’s what Patrick reported during the short article:
Cal, you have got absent above and beyond using this type of website. I didn’t know how to access out In addition to publishing this. I am just stepping into very long array capturing, I've a Ruger Percision in 308, I would really like any tips your ready to give on getting going.
It designed significant signs of strain in .5 g! I couldn’t obtain the velocity i desired without having extreme stress in my customized rig! Es bad as well.
Initially thank you for your time and efforts and experience in undertaking the experiment and secondly in answering my dilemma.