That’s good, William. I hope this Web page evokes others to perform identical checks. The set up was rather straight-forward. You simply need consistent ammo and a great way to evaluate muzzle velocity, so the powder is the one variable. Better of luck to you!
Many thanks for sharing these results. As with anything else from this weblog it’s pretty intriguing and beneficial!
Loading density is ideal for magnums, properly filling the situation at greatest costs, contributing to exceptional uniformity and precision.
In distinction, circumstances that would not have a belt headspace to the shoulder and have a Considerably tighter slot in a chamber. Winchester Supreme .270 Winchester cartridges measured only .003 inch shorter from the situation head face towards the datum line about the shoulder when compared to fired Winchester cartridges.
) Patrick didn’t devote time wanting to tune a load, due to the fact actually we were being seeking to hold the load since the set variable as well as temperature as being the impartial variable. I’d bet the effects would look quite similar concerning muzzle velocity spread, Even though you tuned Every single load. The groups may well appear various, but I just wager the muzzle velocity distribute at diverse temperatures might not range Significantly. So I’m not enthusiastic about investing time digging deeper into it … But I’ve unquestionably been shocked right before! When you’d prefer to run via that, I’d be incredibly interested to hear what you find!
This method leaves an extremely clean, dust free products that may be great for loading. Some modest batch brass is cleaned with standard dry media and brass Harmless polish.
Hodgdon has altered suppliers and locations on several of their labeled powders through the years, based upon particular prior factories not being able to give it any more.
Apparently could also not uncover equation for just a cylindrical rod using a cylindrical gap in imr enduron powders middle and clamped at 1 close which would be a far better design to get a absolutely free floating barrel.
I will be incredibly handy to be aware of the ES and SDEV of the rounds with Each and every of the several powders. The tester generally applied the exact same powder weight for all four powders and even though it wasn't said, I would assumed that they were not centered on an accuracy node in all four conditions.
Interesting factors … but I’m having velocities of 2840 fps with 130 Hybrids employing H4350 in my 22″ six.5 Creedmoor. You can imr enduron powders find Unquestionably no signs of stress. I’m not the male who pushes for getting eek out that final bit of muzzle velocity that has a “incredibly hot” load. That appears to not align with the theory, but there are plenty of variables that Engage in into it (which include the imr 7977 in stock person barrel characteristics) that it’d be difficult to draw conclusions from smaller sample dimensions.
Cal, I deeply appreciate the operate which you do. I needed to weigh in on the LabRadar and MagnetoSpeed dialogue. In terms of precision I might are convinced the MagnetoSpeed is the greater correct evaluate on the Velocity from the bullet mainly because it exits the barrel.
Patrick has grown to be a good Good friend of mine (Cal, the author of PRB), and he stated attempting to do a powder exam. We collaborated on some strategies to approach it, and Patrick took it from there. Patrick is often a meticulous man, and he set inside the Focus on this check. I hope you discover it as interesting as I did. Thanks Patrick!
After we headed towards the array to get a take a look at, we randomly chosen twenty rounds in Each individual caliber from your inventory. We chronographed the velocities that has a Caldwell Ballistic Quality chronograph utilizing their Android cellular phone app.
Excellent get the job done Cal. Could you notify me in case you had 100% powder melt away from the 22″ barrel? Also was the pace according to the Lab radar and verified with Magnedo, or normal of both equally.