Originally Posted by Mikecr
Moving the CG backward is destabilizing though.
I've never understood why plastic tipped bullets are more stable than same form of non-tipped.
The Miller stability formula won't work with these.
If I understand it correctly, the lower density of plastic does not generate a destabilizing mass forward of the CG. Takes less to 'go to sleep'.
Just grabbing the last JBM bullet flight times on my page.
~200,000 to 250,000 rpm
~20,000 to 25,000 revolutions in 100 yards. (.089)
~200,000 to 250,000 revolutions in 800 yards. (1.038)
Made me think about the going to sleep part. Like a thrown foot ball that starts a little wobbly then smooths out. I know this is a poor analogy but can't think of anything closer.