That’s fantastic, William. I hope this Web page inspires Some others to do identical tests. The setup was really straight-ahead. You simply will need consistent ammo and a good way to measure muzzle velocity, so the powder is the sole variable. Best of luck to you!
Having said that, with ample samples the histogram of your samples may possibly suggest a chance distribution function.
Because the IMR Enduron powders cover your entire array of center fire calibers, it would not be fair to simply decide on one particular powder for screening.
Fantastic concern. We didn’t await it settle back right down to ambient. They ended up shot for the extremes. That would have essentially be tests the consequences of storing ammo at Severe temperatures, which I don’t Believe would have close to as remarkable of the influence. But I don’t realize that, so it’d be something else exciting to test!
Nevertheless, in an engineering sense the issue is if the product/regulation is actually a good enough approximation. Can it be suit-for-intent? Does it generate predictions that happen to be adequately correct. For example, the full six DOF method of equations for the movement of the rotating, symmetrical ballistic projectile is a greater approximation compared to the three DOF process of equations although the 3 DOF system is sufficiently accurate For most trajectory calculations. A fascinating position since the bullet would've a higher diameter at higher temperature due to thermal expansion. But, as often, the very important concern is definitely the magnitude with the impact, Would it not alter the muzzle velocity by 100 fps, ten fps, 1 fps, 0.
And it's hard to find. Very hard to find. I really went on Gunbroker.com just before I printed this to test to discover if there was any obtainable, simply because I figured this post could exasperate the condition all the more.
I have done quite a few lookups right here looking for information on the 150gr Partition and IMR 7977 and came up empty. I decided to perform a little experimenting by myself and go determined by what Hodgdon experienced mentioned.
Cal Zant is the shooter/writer behind PrecisionRifleBlog.com. Cal is usually a everyday living-extended learner, and likes to assist Other individuals enter into this Activity he is so excited about.
But, the LabRadar is two times as pricey (all-around $600 last I observed), so it IMR 7977 just will depend on what cash means for you. When you have The cash, I’d propose the LabRadar. Although the MagnetoSpeed is really a killer value. I’m convinced no chronograph around can give the worth that the MagnetoSpeed does for the price.
But there wasn’t any up there on the market. I'm able to’t don't forget the last time I observed it to the shelf. It’s practically been a long time.
Actually, you certain might be ideal with regards to the MagnetoSpeed currently being much more correct. imr 7977 in stock It’s blind religion In either case, because I'm able to’t truly think about An inexpensive solution to figure it out. If I'd access to a full-blown, Experienced doppler setup Or perhaps a commerical Oehler unit like what Sierra or anyone uses, you could possibly most likely determine it out.
Well, Mike. It’s almost certainly not as big of the deal as you're thinking that. Look at the velocity dissimilarities while in the chart I posted within the reviews. That man chopped a barrel down a person inch at any given time, and recorded muzzle velocities. Observe imr enduron powders that a 22″ barrel was just fourteen fps slower than a 27″ barrel.
And Here's yet another perspective of the final results, which exhibits exactly how much the normal alter in muzzle velocity For each 1 diploma of temperature alter through the total range of temperatures.
I used to be glad to view that you simply capable the outcome to the particular many powder used. These quantities will improve from ton to ton for almost any presented powder.