Spuhr

6.5 Creedmoor- Effect of Barrel Length on Velocity: Cutting up a Creedmoor!

February 22, 2016 Bill Marr 0

Since its introduction by Hornady in 2007, the 6.5 Creedmoor (sometimes shortened to Creed) has established a strong foothold in the US rifle market. The 6.5 Creedmoor balances the excellent external ballistics of .264″ diameter bullets […]

308 Winchester/ 7.62x51mm NATO Short barrel length and velocity- A six inch 308 bolt gun?

February 1, 2016 Bill Marr 0

I woke up early that morning. It was only a few days after a historic blizzard passed through my state. Stir crazy, I couldn’t wait to get outside. The chill from my snow covered feet […]

308 Winchester 175 Sierra MatchKing Ladder Test with Varget and IMR 4064

February 6, 2015 Bill Marr 0

I often utilize traditional methods to develop hand loads for my rifles. Normally, I’ll load five rounds of a given charge in .3 grain increments for a given powder (some shooters load 3, or 6, for […]

6.5 Grendel Review: 18″ Special Purpose Rifle

February 1, 2015 Bill Marr 0

The 6.5 Grendel was created as a 200-800 yard cartridge to fit into a standard AR-15 magazine. Based on the 220 Russian cartridge (the parent case utilized for the 7.62x39mm, 5.45x39mm and the 6PPC), the 6.5 […]

308 Winchester Barrel Length and Velocity: Winchester 147 grain FMJ

January 24, 2015 Bill Marr 0

Introduction I cut back a 28″ barrel 308 Winchester one inch at a time, to 16.5″, and recorded velocity data for four different cartridges. The data was summarized in 308 Winchester / 7.62x51mm NATO: Barrel Length […]

7.62x51mm NATO (308 Win) Barrel Length and Velocity: IMI Samson 150 grain FMJ

January 24, 2015 Bill Marr 0

Introduction I cut back a 28″ barrel 308 Winchester one inch at a time, to 16.5″, and recorded velocity data for four different cartridges. The data was summarized in 308 Winchester / 7.62x51mm NATO: Barrel Length […]

308 Winchester Barrel Length and Velocity: Federal 168 grain Gold Medal BTHP

January 24, 2015 Bill Marr 0

Introduction I cut back a 28″ barrel 308 Winchester one inch at a time, to 16.5″, and recorded velocity data for four different cartridges. The data was summarized in 308 Winchester / 7.62x51mm NATO: Barrel Length […]

308 Winchester Barrel Length and Velocity: Winchester Super X 180 grain Power-Point

January 24, 2015 Bill Marr 0

Introduction I cut back a 28″ barrel 308 Winchester one inch at a time, to 16.5″, and recorded velocity data for four different cartridges. The data was summarized in 308 Winchester / 7.62x51mm NATO: Barrel Length […]

308 Winchester / 7.62x51mm NATO: Barrel Length versus Velocity (28″ to 16.5″)

December 27, 2014 Bill Marr 0

308 Winchester / 7.62x51mm NATO: Barrel Length versus Velocity (28″ to 16.5″) Introduction Released by Winchester in 1952 (and adopted by NATO in 1954 as the 7.62x51mm NATO), the 308 Winchester has gained universal acceptance amongst […]