Examine This Report on IMR 7977
Examine This Report on IMR 7977
Blog Article
That’s good, William. I hope this Internet site evokes Many others to complete related tests. The setup was rather straight-ahead. You just need to have constant ammo and a good way to measure muzzle velocity, so the powder is the one variable. Better of luck to you!
Therefore if E varies with temperature and equally rho and L change due to thermal growth the basic frequency and every one of the harmonics will also. Test as I would I could not discover a reference for variation of E with temperature for metal. but I ensure you it does.
That’s an interesting level, Steve. I haven’t at any time listened to a person point out that just before. I don’t assert to generally be an expert in metallurgy, so that could certainly be the case. And I commonly admit that Like several check, this wasn’t best. I heard an information analyst say a single time “
An Digital powder dispenser would also do the job, if you need to stare on the wall though it's going to take eternally to dribble out the powder.
We utilised precisely the same Hornady, Sierra and Nosler bullets in our exams that we load for our hunts. The specific bullet weights and kinds are demonstrated within the desk under.
I am aware copper bullets are for a longer period but dang I might have desired a fall tube to make it perform to get to even near to max load. Pictures confirmed superior strain early on in a rifle that usually likes the sting of max.
Yeah, Rick it seems like we predict lots alike! I do shoot at temperatures which can be distinct than I zeroed, although I check my zero pretty usually … so I suppose that limits that to a point. I mainly shoot at 55-95 levels ninety% of time, but when I’m searching which could be as little as ten degrees or at a summer time-time match, I would shoot in temps as significant as one hundred and five.
The Enduron powders are reported to supply optimal load density, leading to imr enduron powders small SD figures for strain and velocity, which must subsequently, deliver good accuracy.
It really tracks the bullet out to about eighty yards, having several velocity readings alongside how. The muzzle velocities collected proved to get extremely comparable amongst The 2 equipment, which gave me a great deal of self-confidence in the information. Both equally of such units appear to be way more accurate and trusted than conventional mild-dependent chronographs. But to test to mitigate any potential measurement faults, we averaged the velocities collected for every shot from equally equipment.
Fascinating points … but I’m having velocities of 2840 fps with one hundred thirty Hybrids making use of H4350 in my 22″ six.five Creedmoor. You can find Totally no indications of stress. I’m not the dude who pushes to obtain eek out that past bit of muzzle velocity with a “scorching” load. That appears to not align with the theory, but there are so many variables that Participate in into it (which includes the person barrel IMR 7977 qualities) that it’d be not easy to attract conclusions from modest sample sizes.
DuPont accustomed to make a lot of powder during the US, and operated like forty some facilities at one particular time, Nonetheless they ended up damaged up following the government shut them down resulting from anti-trust guidelines to prevent the monopoly they'd. Hercules took around some in their factories, and IMR (Beforehand owned and started by DuPont) operated stand alone for the little bit right before increasing into copyright.
Unsure why however, as it absolutely was just announced, but IMR 7977 Hodgdon will no more offer any of the IMR Enduron product or service line of powders.
They’re my Key viewers, and I make an effort to form the content for them, and maybe insert a couple nuggets in there for the greater Superior group (like With this submit, I pointed out the non-linear marriage and introduced up the query about primer stability). When I do try and use sound tests techniques that could fulfill most Specialist researchers, eventually, I’m not trying to write whitepapers that may only be recognized because of the engineers amid us. That’s enjoyable for me, but it just boundaries the value you insert for the taking pictures Group as a whole. So I constantly attempt to current the effects in a means even a newbie could comprehend. Hope that is sensible. Sorry for the extended-winded response. Your place is an effective just one, and also you naturally set thought into it … so I just wished to check out that can assist you have an understanding of my see Once i’m composing this type of written content.
Actually, we just aren’t considering that powder thanks to what we’ve knowledgeable with it concerning temperature sensitivity.