06/19/2026
I wrote a concise guide to barrel markings, lands, grooves, and twist rates to help you improve accuracy and make smarter choices for your firearm. Read practical explanations of: • What lands and grooves do • How twist rate affects bullet stability • Typical twist recommendations (5.56mm, .308, .22-250) • How markings help with ID and gunsmithing • Maintenance tips to protect rifling
If you’re in Live Oak or greater San Antonio and want expert help, I’m Roland Lamothe — AGI-certified and veteran‑owned — offering precise repairs and custom work by appointment. Learn more and read the full article here: https://wix.to/tVwuFBB
Have a question about your barrel or twist rate? Ask below — I’ll respond.
Barrel Markings & Rifling Explained: Understanding Lands, Grooves, and Twist Rates for Improved AccuracyBy Roland Lamothe, RTF3TX GunsmithingWhen it comes to fi****ms, the precision of a shot significantly depends on the intricacies of barrel design, including the characteristics of lands, grooves,....