Thread: New .270 cal cartridge from Winchester

180,000 rpm sounds like an dramatic way of describing it.
1:8 twist means the bullet will rotate about 500 revolutions over a distance of 100m.
1:10 twist means the bullet will rotate about 400 revolutions over a distance of 100m.
Passing through a deers chest, a typical bullet will only rotate 1.5 to 2 times.
Not that extreme really.


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