The Best Keyhole Example Ever!

[CalmerThanYou]

I would love to hear what that sounded like twirling down range.

 

[griz]

I got keyholes like that from a slow twist 223 with 55 gr bullets at less than 1500 FPS. I was trying for something around 22 LR but that was so slow that they consistently hit sideways at 25 yards. I have no idea why a normal load like that would keyhole. Does the gun shoot other rounds well?

 

[Prof Young]

Thanks Mississippi! You clearly know a lot more about ballistics than I do. You get your knowledge from years of shooting or did you do some studying? I did okay in my physics class in high school so . . . Any suggestions for things to read in this regard?

Thanks again.

Life is good.

Prof Young

 

[Stats Shooter]

when I initially got into the Navy, I was a fire Controlman.....a ballistician basically for missiles and worked on gyros and gyroscopic principles for said missiles.

I have read many many magazine and online articles with respect to ballistics. But the only books I have read are by Bryan Litz for long range shooting.

And this book for reference.

I still have so much to learn that I barley qualify as a novice.

 

[jmorris]

I've never seen more in one place than this photo.

 

[Prof Young]

Thanks Mississippi. I may take a look at those books, especially the second one. It looks like a good basic education in understanding bullets.

Life is good.
Prof Young

 

[Prof Young]

Oops. Was reading back thru. On Sept 9 post about my Rem 7 I have the numbers mixed up. Rem 7 was 1:12 twist. Savage was 1:8.

Life is good.
Prof Young

 

[hdwhit]

Mississippi wrote:
And you can't really over spin the bullet, provided it doesn't fly apart due to centripetal force.

Thanks for remembering to add that second clause.

I have to be careful with my 40 grain loadings in my ARs (1:9) since about 3400 fps there's a whisp of silver-grey vapor about 50 feet from the target.

But, in this case, a 1:8 twist at super sonic speeds should easily stabilize a 150 gr .30 cal bullet.

Agreed.

This is interesting.

When (and if) it gets explained, please post it.