Sectional density should be mass/area.
Sectional density for bullets is weight / bullet diameter squared.
So the area of a 9mm is 0.126736 using the ballistic sectional density formula instead of 0.09954?
The area of a square with the bullet diameter is what is being calculated, not the area of circle.
I think we've hit a rule of thumb again.
So our 115gr bullet has a ballistic sectional density of 0.13 or an engineering sectional density of 0.165...
It makes one wonder what happened.
Related:
The Wikipedia article on Sectional Density appears to have been written by someone for whom English is a second language.
Click here to submit $0.00 US for a lifetime subscription
Posts
Comments
No comments:
Post a Comment
You are a guest here when you comment. This is my soapbox, not yours. Be polite. Inappropriate comments will be deleted without mention. Amnesty period is expired.
Do not go off on a tangent, stay with the topic of the post. If I can't tell what your point is in the first couple of sentences I'm flushing it.
If you're trying to comment anonymously: You can't. Log into your Google account.
If you can't comprehend this, don't comment; because I'm going to moderate and mock you for wasting your time.