There seems to be a lot of “opinion” about the issue of Barrel Twist, and particularly the relationship between the twist, groove, and ammunition.
Here are some well-written articles and videos. When you know the answer, perhaps you will let us know!
Articles and Calculators:
Miller Twist Rule
https://en.wikipedia.org/wiki/Miller_twist_rule
and
https://wikivisually.com/wiki/Miller_twist_rule
_________________________________
JBM Ballistics (Very academic, but some wonderful information)
http://www.jbmballistics.com/ballistics/downloads/downloads.shtml
_________________________________
Twist Rate Stability Calculator
_________________________________
Bison Ballistics Gyroscopic Stability Calculator
https://bisonballistics.com/calculators/stability
_________________________________
Does Rifling Affect Ballistics?
https://bisonballistics.com/articles/does-rifling-affect-ballistics
_________________________________
Effect of Rifling Grooves on the Performance of Small Caliber Ammunition (US Army Research Lab
http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA505719
_________________________________
Miller Twist Rule
https://www.revolvy.com/page/Miller-twist-rule
_________________________________
Calculating Bullet RPM
http://bulletin.accurateshooter.com/2008/06/calculating-bullet-rpm-spin-rates-and-stability/
Common Misconceptions about Twist
http://bulletin.accurateshooter.com/2016/08/twist-rate-common-misconceptions-about-twist-and-stabilization/
_________________________________
New Formula for Gyroscopic Stability of Open Tipped Match Style Rifle Bullets
http://forum.accurateshooter.com/index.php?topic=3834705.0
_________________________________
VIDEOS
One of our long term favourites, Rex Reviews.
N
Bullet Stability & Barrel Twist (the excellent Brian Litz)
