Ha! Attention-grabbing position, but I went again and looked at the data. As I discussed in Several other feedback just lately, I shot five distinct cartridges/loads in excess of all three of All those chronographs.
Thanks for sharing these effects. As with anything else from this site it’s extremely appealing and practical!
That’s an interesting issue, Steve. I haven’t at any time listened to somebody point out that right before. I don’t declare to get an authority in metallurgy, so that could absolutely be the case. And that i conveniently confess that Like several take a look at, this wasn’t great. I heard a data analyst say one time “
An electronic powder dispenser would also work, if you would like stare in the wall even though it takes for good to dribble out the powder.
I am aware references that determine barrel harmonics/vibrations and references that current the temperature dependence from the elastic constants of metal but none that explicitly estimate the transform of barrel harmonics/vibrations for a operate of temperature as a consequence of effect on elastic constants. A job.
They sat while in the cooler for four several hours to make sure they were evenly acclimated on the temperature. A thermometer was put while in the cooler with them to evaluate what the final temperature wound up staying.
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And dang, that Harold Vaughn Rifle Accuracy Information is a superb e-book, isn’t it?! I purchased several books like that each one simultaneously, and I used to be slowly creating my way by way of all of these … but that one is a thing Particular. I desire I could’ve collaborated or at the least experienced a great dialogue with Mr.
For that reason, we picked 5 distinct rifle calibers to check all 3 powders concurrently. This turned out to become a bigger process than we had initially envisioned, but the outcome were being worthy of the effort.
I could now not get my aged preferred powder with the 7mm IMR 7977 Remington Magnum. Gavin advised that I try several of the new Enduron powders, IMR 8133 and IMR 4955.
All of the powders listed Listed here are extruded. These “stick” powders never dispense from the powder evaluate really as exactly as spherical powders. I dropped 10 prices of every powder from a evaluate and weighed them to view exactly how much weights various. The outcomes adhere to:
Perfectly, Mike. It’s in all probability not as big of the deal as you believe. Think about the velocity differences within the chart I posted within the opinions. That guy chopped a barrel down a single inch at any given time, and recorded muzzle imr enduron powders velocities. Recognize that a 22″ barrel was just 14 fps slower than a 27″ barrel.
I shot the whole string of chilly without delay. The many incredibly hot. The many ambient. I waited ten minutes amongst the strings. I'd the timer set on my telephone so it absolutely was relatively correct in my view
I am able to only think Typical Dynamics (who can make the imr enduron powders particular powder) can no more continue to keep rendering it for them. I know they used to make lots of powder for Hodgdon and once they have been awarded a huge protection deal they instructed Hodgdon they'd only manage to keep earning the Enduron powders accessible to them.