April 13, 2026
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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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USMC M40A5 Build- Part 5: Bedding and final assembly

Gunsmithing
December 16, 2015 0

Tactical Operations bolt knob installation on a Remington 700

Gunsmithing
March 14, 2017 0

Smith and Wesson K-Frame revolver barrel removal and installation

Gunsmithing
November 24, 2019 0

Building a custom 308 Winchester precision rifle: Howa 1500 action & MDT ESS chassis

Gunsmithing
January 4, 2018 0

Building a custom Howa 1500 in 223AI

Gunsmithing
May 12, 2018 0
308 Winchester / 7.62x51mm NATO: Barrel Length versus Velocity (28" to 16.5")
6.5 Creedmoor- Effect of Barrel Length on Velocity: Cutting up a Creedmoor!
Review: Mossberg MVP Patrol 5.56mm NATO (223 Remington) and 7.62 NATO (308 Winchester)
Building a 9mm Bolt Action Rifle
Ruger American Rifle Predator 223 Review
223 Remington/ 5.56mm NATO barrel length and velocity: 26 inches to 6 inches
Budget precision rifle: Customizing the Savage Axis
Howa 1500 barreled action review: Howa 1500 versus Remington 700
Howa 1500 Review
M24 Sniper Rifle Review

DVD Review: Tactical Pistol Operator with Paul Howe

Ultimatum Precision redesigned bolt for the U300: reduced bolt lift

IWI US Tavor

TS Customs Quick Adjust Knob for KMW Loggerhead Cheekpiece


 

 

 

 

 

Building a USMC M40A3: Cloning the Marine Corps Sniper Rifle from 1999-2009

January 4, 2016 0

Rifle action stuck in bedding? Build a Remington 700 action puller

February 17, 2015 0

Review: Howa MINIACTION 7.62×39

April 1, 2017 0

Remington Model Seven Chassis Options from Modular Driven Technologies (MDT)

November 9, 2015 0

Defensive Shotgun Patterning: Deconstructing the one inch per yard myth

January 27, 2013 0

Remington 870 barrel work: remove rifle sights, cut and crown

August 17, 2015 0

Understanding shotgun back bore

July 24, 2015 0

Remington 700 versus Savage 10/110: Comparative design notes

March 9, 2016 0

Building a custom 7mm Rem Mag Hunting Rifle-PART 1

June 25, 2022 0

Replacing a plastic recoil pad on a shotgun

August 31, 2022 0

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  • 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
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