Originally Posted by
andy148
...... and will be about 3000rpm.
Not sure how relevant to the original post this is, but I think that you're wrong.
Spin rate is relative to velocity and rifling twist rate (pitch).
Standard calc is
Bullet RPM = MV X 720/Twist Rate (in inches)
I was using typical numbers for a NATO round and that gives about 180,000 RPM when fired from a barrel with 10 inch pitch - again, very typical.
Are you sure you didn't mean 3,000 Revs / sec?
The rest of your post seems pretty right. For instance 8 inch pitch and high velocity can cause over-stabilisation; which is actually
unstabilisation.