Bullet RPM and accuracy

[justin davis]

Let’s talk Bullet RPM…Berger recommends 300,000 max and Hornady recommends 290,000. Does accuracy degrade if your over the recommended max? Is there any downside other than if you’re spinning too fast and bullets are blowing up?



I’ve been messing with some Hornady ELDMs in a 22 creedmoor. They are going 3450. They are 310,000 rpm if I calculate it right. They don’t seem to shoot that well. There will be a tight group but then I get one or 2 random flyers. I’m wondering if I am spinning the bullets too quick. Or maybe the barrel just doesn’t like the bullets and it’s unrelated to the rpms. Wonder if I slow it down if they would shoot better?

 

[RockAndSage]

Man, that's a great question. A good control would be if monos started sending fliers above 300krpm.

Does a traditional bullet have to blow-up entirely, or could the fliers be from just a little separation between jacket and core?

 

[180ls1]

Man, that's a great question. A good control would be if monos started sending fliers above 300krpm.

Does a traditional bullet have to blow-up entirely, or could the fliers be from just a little separation between jacket and core?

My mono gun is @ 350K and is by far the most accurate one I own. 7" 6.5 @ 3400 with 124hammers. It also has shock dropped more animals in their tracks than anything else I own.

 

[waspocrew]

My 22 CM is spitting 62 ELDVTs at like 350,400. Absolute lasers. 1:7.5 twist at 3650 FPS. None have blown up in flight.