Q&A: .30-Caliber Twist Rates

by
posted on July 6, 2020
30cal_1.jpg

From the vault: A reader-submitted question about .30-caliber twist rates. As published in the October 2001 issue of Shooting Sports USA.

Q. Most .30-caliber barrels are 1:10 twist, and .30-caliber bullets range from 90 to 220 grains, what is the optimum twist rate to stabilize a 150-grain bullet?

A. The .30-caliber rifles and bullets are more forgiving when selecting barrel twist rate. Practically every rifle maker known today offers its .30-caliber barrels in either 1:10, or 1:12 twist. The 1:10 twist is the overwhelming favorite, but that may just be so primarily for simplification in the manufacturing processes. Remington, for instance, makes its .308 Win., .30-06 Springfield and .300 Winchester Magnum barrels all with a 1:10 twist. If you were considering using 200-grain or heavier bullets regularly in your .30-caliber rifle, we would suggest sticking with a 1:10 twist. If we were building a rifle to shoot best with 150-grain bullets, our choice would be 1:12 twist.

Submit your questions to [email protected].

Lead photo of a Hawk Hill Custom Cut-Rifled .30-cal. barrel courtesy of Altus Shooting Solutions.


See more: .45 ACP Overall Length

Latest

Staccato XL 011
Staccato XL 011

Staccato XL Competition 2011

This fast-cycling, flat-shooting competition 9 mm with extended sight radius is perfect for action pistol competition and the Tactical Games

Sporting Clays Shooter Madison Sharpe Joins Team Remington

Madison Sharpe is now a member of Team Remington’s impressive roster

Hillsdale College Hosts USA Shooting Junior Olympic Rifle National Championship For Second Consecutive Year

Olympic hopefuls compete at Hillsdale College for spots on the U.S. Junior National Team

New: SIG CROSS-PRS Rifle

SIG Sauer says its CROSS-PRS precision rifle “delivers an extremely capable long-range shooting experience that scores big on the range, right out of the box.” 

Kentucky Wins 2022 NCAA Rifle Championship

Back-to-back NCAA rifle championships for the Kentucky Wildcats

President Donald Trump To Speak At 2022 NRA Annual Meetings & Exhibits

President Donald J. Trump will address NRA members for the sixth time at the 2022 NRA-ILA Leadership Forum in Houston, Texas

Interests



Get the best of Shooting Sports USA delivered to your inbox.