May 28, 2025
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Bill Marr's journal of shooting, reloading and gunsmithing

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What's new?
  • [ January 26, 2025 ] 782 Custom Gunworks “HUNDO” Loading Block Editorial
  • [ January 26, 2025 ] How do rifle suppressors affect muzzle velocity? Precision Rifles
  • [ May 31, 2023 ] The A-Team Mini-14? Customizing a Ruger Mini-14 A-Team
  • [ April 30, 2023 ] Removing stripped and sheared screws from a rifle Gunsmithing
  • [ February 28, 2023 ] Cut and Crown a Winchester 94 30-30 Gunsmithing
Home7.62x51mm NATO

7.62x51mm NATO

6.5 Creedmoor

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 […]

Barrel length

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 […]

Barrel length

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 […]

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 […]

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 […]

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 […]

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 […]

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Lengthening a shotgun’s forcing cone

Gunsmithing
February 3, 2013 0

Surefire X300 Review

Handguns
September 11, 2011 0

6 Creedmoor barrel length versus muzzle velocity (31 to 17 inches)

6 Creedmoor
January 22, 2017 0

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

Barrel length
January 24, 2015 0

Do rifle barrel coolers work?

Reviews
August 2, 2017 0
308 Winchester / 7.62x51mm NATO: Barrel Length versus Velocity (28" to 16.5")
223 Remington/ 5.56mm NATO barrel length and velocity: 26 inches to 6 inches
6.5 Creedmoor- Effect of Barrel Length on Velocity: Cutting up a Creedmoor!
223 Ackley Improved (223AI) loads and review: A better 223?
300 Winchester Magnum: How Does Barrel Length Change Velocity- A 16" 300 Win Mag?
M24 Sniper Rifle Review
308 Winchester/ 7.62x51mm NATO Short barrel length and velocity- A six inch 308 bolt gun?
6 Creedmoor barrel length versus muzzle velocity (31 to 17 inches)
Stripped screw removal (RMR from pistol)
338 Lapua Magnum: Barrel Length Versus Muzzle Velocity (30-17 inches)

6.5 Creedmoor Barrel Speed: Can shorter barrels shoot faster?

MDT ESS Folding Stock Review

Remington Model Seven Actions are available!

MDT LSS-XL GEN2 review


 

 

 

 

 

No Picture

Sure Site Target Hangers

July 21, 2012 0

Does primer size matter? PART-2 CCI 200 v CCI 400

July 2, 2018 0

Starline 6.5 Creedmoor Brass Endurance Testing- firing the same cases 15 times

July 16, 2018 0

PSA: Don’t melt your MagnetoSpeed with a suppressor!

December 2, 2018 0

Worst case scenario: pin and screw removal-EDM machining in gunsmithing

October 2, 2018 0

Advice for the amateur gunsmith

August 16, 2013 0

Building a 9mm Bolt Action Rifle

October 27, 2019 0

Armalite AR-30 muzzle brake installation

June 9, 2019 0

5 Reasons to consider gunsmithing as a hobby

June 28, 2013 0

Remington 870 Flexitab system and parts identification

March 15, 2015 0

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  • 782 Custom Gunworks “HUNDO” Loading Block
  • How do rifle suppressors affect muzzle velocity?
  • The A-Team Mini-14? Customizing a Ruger Mini-14
  • Removing stripped and sheared screws from a rifle
  • Cut and Crown a Winchester 94 30-30
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