As with a number of other cartridges that employ a belt to set headspace, new 7mm Remington Magnum cases and loaded cartridges tend to be shorter on the shoulder.

Ha! Which was Patrick’s idea, and when he talked about that it blew my intellect far too. My gut tells me you wouldn’t see as much variance as you'd in powders, but I undoubtedly don’t recognize that.

Some powders ‘cheat’ ,producing and immpresion of balance with a specific flat line band. Vihtavouri N140 is just one these types of powder its dead secure in 18-23°C temperature assortment ,which handles temps Significantly with the yr in central Europe .

And I agree with the point on Varget becoming additional steady at lessen temperatures. A further reader produced a remark about that, and Truthfully I hadn’t built Notice of that prior to deciding to guys said a little something over it. It is a fascinating level, as well as a persuasive situation for hunters to build hundreds dependant on Varget. I personally hunt which has a 7mm Rem Mag (aka God’s looking cartridge ), so I wonder if H1000 or Retumbo show similar Attributes.

I understand references that determine barrel harmonics/vibrations and references that current the temperature dependence of your elastic constants of steel but none that explicitly compute the adjust of barrel harmonics/vibrations to be a operate of temperature as a result of impact on elastic constants. A project.

I'm sure copper bullets are longer but dang I might have required a drop tube to really make it perform to acquire to even close to max load. Shots confirmed higher stress early on in a very rifle that typically likes the edge of max.

That is a wonderful question. A few months in the past, I shot one hundred rounds by way of 3 chronographs: the LabRadar, MagnetoSpeed, and Oehler 35p. I intended to publish a publish about that, but just by no means have. So I’ll attempt to offer a quick synopsis. The LabRadar and MagnetoSpeed tracked quite equally. They weren’t off by more than a pair ft per next on Anyone studying. The LabRadar picked up about ninety five% on the shots, whilst the Magneto Velocity picked up 100% of the shots. Taking pictures from the Oehler might need afflicted the LabRadar’s power to track the bullet, so for those who didn’t have that in front of it You may have got all 100 pictures. Although the Oehler 35p was my go-to chronograph and viewed as imr 7977 in stock the gold regular For several years … it wasn’t wonderful when compared with one other two.

I didn't get single digit SD’s with both equally IMR powders, However they had been even now respectable. I’m certain I could fantastic tune the hundreds for any of those powders and obtain fantastic benefits.

Attention-grabbing Check. Another thing I discovered is that even though IMR4166 didn’t had the smallest IMR 7977 muzzle velocity per degree fahrenheit variance, It appears to own quite possibly the most liniar characteristics.

Thanks Cal, It’s presently preordered and I’m really seeking forward to beeing shocked! Occurs to get perfectly timed, since I’m at this time thinking of paying cash on a more subtle annealing setup, and It might be amazing for making this selection determined by correct data. Knowledge is ability, they say…

Tests is all done, Ring. We don’t have options to check another powders at this time. But, you ought to go exam it in case you’re considering that powder. This is often really straight-ahead things.

I believe I will follow my sixty six.40 grain IMR 7828SSC load and plug the temperature variances into the Utilized Ballistics app. That load is offering my a bit about 2900 fps and sub MOA teams. I assume that falls under the "if it ain't broke Never take care of it" category.

As well as imr 7977 in stock you’ll get to meet Various other people who find themselves into these items, and maybe even create a number of buddies which can help you together.

Does one signify SD with regard to the group Middle? In that case that is definitely a person evaluate of precision. Or do you imply SD with respect towards the aim level?