About IMR 7977
About IMR 7977
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The identical increase in temperature also causes the nitro cellulose primarily based powder inside the cartridge to burn off at a higher fee, manufacturing close to 4 instances The purpose of Effects (POI) change than simply air temperature by yourself.
I introduced a box of your Hornady Precision Hunter ammo Along with the 145gr ELDX together to check out how they carry out also. 2790fps (2970 marketed on box)was what I recorded for 5 photographs and precision wasn't that fantastic possibly. Next caliber that i've acquired and my rifles don't love.
As most reloaders know, there are powder weights that deliver both equally precision and small SDEV but additionally weights that produce 1 or one other. When ES/SDEV usually are not dependable, they have an inclination to distort the normal MV calculated. Just wondered if this impacted the results posted.
The velocity was not what I am searching for at this stage. I'm looking to be while in the 2900fps realm but at the moment Using the 60gr load I am sitting down at 2843fps regular. Unsure .eight of a grain will get me much more velocity.
In actual fact, occasionally We have now noticed an inversion in the powder temperature – muzzle velocity romantic relationship for a specific large amount of powder exactly where the muzzle velocity in fact lessened because the powder temperature greater.
It’s interesting that at each and every match I’ve been too, I’ve never heard about everyone utilizing Winchester primers. (Take note: Hodgdon and IMR seem like sister corporations of Winchester Powders, to ensure might have affected their decision.)
We’ll check out the results in a handful of different ways. Let’s get started simply by checking out the overall variance in muzzle velocity we calculated around your entire range of temperature extremes:
It’s really worth noting that With this circumstance Varget is about 2 times as secure as the rest, who subsequently are basically equivalent. Just an observation. Thanks yet again for an awesome blog site. Christian
What size barrel are you currently working with? I've actually bought some IMR 4831 but I figured it would be far too quickly burning. I'll give it a test, I do not actually have the rest that might be far better.
The objective of this subject examination was to quantify the temperature security of the popular Hodgdon H4350 and Varget powders and compare These to IMR’s new Enduron line of powders. To achieve this we carefully measured muzzle velocities of meticulously loaded ammo over a large variety of temperatures.
Screening is all completed, Ring. We don’t have programs to test another powders at this stage. But, you need to go examination it in case you’re interested in that powder. This is rather straight-ahead things.
I feel I'll follow my 66.40 IMR 7977 grain IMR 7828SSC load and plug the temperature variances on the Used Ballistics app. That load is offering my a bit around 2900 fps and sub MOA groups. I assume that falls under the "if it ain't broke Really don't take care of it" classification.
Right here is a wonderful paper composed by an OU professor on “The Myth on the three Shot Team”. I study it a several years back, and I bet you’ll find it irresistible!
On top of that, for each of the tree huggers imr 7977 in stock on the globe, there aren't any elements considered unsafe to the setting. Except, needless to say, you think about blowing A 3 inch gap through a trophy bull elk at 200 yards imr enduron powders damaging.