Useful Ballistic Resources from Canadian NFA
The Ballistics Page for the Canadian National Firearms Association (NFA) website offers a variety of useful programs and data charts created by Peter Cronhelm. These include:
Greenhill Formula Twist Calculator
Bullet Stability Calculator (MS Excel)
Ballistic Coefficients Chart (MS Word), (Or DOWNLOAD HERE.)
Ranging Ballistics Computer (Scroll to bottom of page.)
There is even a detailed table with bullet weights and velocities for over 100 varieties of 22LR Rimfire ammunition from Aguila, CCI, Eley, Federal, Fiocchi, Lapua, PMC, Remington, RWS, and Winchester. This Rimfire Ammo Table is a “must-have” resource for any smallbore shooter. Shown below is the section for Lapua:
The stability calculator works pretty well, at leasst from my experience.
I know its hard to keep up, but the Bullet BC chart is out of date, and does not include some of the bullets released within the last two years, like the 6.5mm 130 grain Berger and the 7mm 175 Sierra Match King.