Ball Flight

[necchi]

Sorry, I guess I shouldn't apply the experience with my own Chronograph and years spent hand loading CF cartridge nor 24 years of ML shooting.

Knock yourself out, learning is a good thing best done first hand.

 

[rodwha]

"Maybe I shouldn't, but there are many here who's opinion carries weight just having read so many responses that gives the impression of knowing what they are talking about, and yours is one of them."

Without knowing you, but looking at the many responses you've given me and others, I've accepted (at least usually) your responses as worth listening to. I certainly don't disregard your responses.

 

[AustinTx]

Any yall ever seen imparted windage at distance, like a curve ball.

What happened to my post? I ain't figured this out yet, evidently. I'll be back, if I can find my reply.

Edit (Original post that disappeared):

We called that curve "windage jump". It's caused by the gyroscopic spin of the bullet, in the earth's rotation. CW rifling will drift one way and CCW rifling will drift the other. The B-58 fire control system computer corrected for that windage drift.

 

[Joel/Calgary]

Any yall ever seen imparted windage at distance, like a curve ball.

It can happen in a smoothbore, especially with a bend or a dent near the muzzle. Actually, a deliberate bend down to give consistent "backspin" was sometimes used in period* to give improved accuracy and reduced drop, just as is done now in paintball.

Regards,
Joel

* but I can't find the references any more - one may have been by Benjamin Robins.