I loaded Just about every situation at what I understood will be a moderate to medium load, in an effort to stay away from force spikes. None of the hundreds had been “tuned” for the particular rifle we were tests with.
Before this yr, there was a PRS match in Nebraska where competition had to shoot inside the snow, and a lot of the very same rivals is going to be present in Oklahoma taking pictures “The Heat-Stroke” match mid-July where temperatures could exceed one hundred degrees!
Potentially big concern is how many photographs to obtain excellent stats. Setting up the 100yd precision is an additional make a difference. Conventional wisdom claims at the time Use a precise team centering This is a piece of cake. I'm not so selected but may be my ignorance. A detailed description of your respective methodology to ascertain 100yd precision with photographs will be a boon to me. Next most effective can be your suggestion of references. Many, several thanks to the effort and time to perform the experiments and comment on my and other posts.
There are statements produced occasionally about cartridge layouts currently being additional effective than Other folks. For example it is often said the 6XC is a lot better than the 243Win because it can get to the exact velocities with seven grains less powder. Now That is legitimate but IMO I think The main reason it is best is because the powder burn rate from the powder getting used is healthier for that cartridge capability. I am absolutely sure Hodgdon could produce a powder exclusively with the 243Win that might make it execute even better compared to 6XC for the reason that loaded to a similar pressures the 243Win will burn extra powder and thus have the next velocity. The trick is locating the ideal powder for that cartridge capability, barrel duration and bullet.
Loading density is great for magnums, properly filling the case at most charges, contributing to outstanding uniformity and accuracy. The 7mm Remington Magnum “hardly ever experienced it so imr enduron powders great”!
I make use of the Strelok app as my ballistic calculator and it's got powder temperature input, but I don’t understand what it’s adjustment variable is or if it may be manually established towards the 0.21 fps/File which you calculated. I’ll check into it and find out if I can refine the calculations for improved predictions.
I've performed many searches below on the lookout for info on the 150gr Partition and IMR 7977 and arrived up vacant. I decided to do some experimenting on my own and go dependant on what Hodgdon had shown.
It’s amusing how a question like that will bring to gentle many of the simple assumptions we make! I’ve undoubtedly thought about that a single a whole lot considering the fact that I initial heard him recommend imr enduron powders it.
IMR now offers 4 Enduron powders that address a broad range of burn off fees. They are suited to lots of cartridges, from modest varmint cartridges all of the way up into the .338 Lapua Magnum.
Now Enable’s operate that very same correct circumstance for that muzzle velocities we obtained for quite imr enduron powders possibly the most temperature secure powder, H4350.
Appealing idea nevertheless! May very well be correct. I’m satisfied with the outcome I’m getting, so I suppose whether or not many of the powder is burned or not isn’t some thing I’m all of that concerned about.
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The primary characteristics of your Enduron series are copper fouling eliminator, insensitivity to temperature improvements, best loading density and staying eco-friendly.
So honestly, the selection of temperatures you see in this powder test probably stand for the intense choice of temperatures you’d practical experience in the problem you described. I’d imagine that Even when you still left the round in a chamber that begun out at 149° File, the gun powder would probably by no means warmth up in excess of the 140° File … mainly because barrels start to cool rather promptly.