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
Homeoptimum 308 barrel length

optimum 308 barrel length

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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Muzzle Brake Installation on a Precision Rifle: Timing and Installing an OPS R3E2C

Gunsmithing
December 1, 2013 0

USMC M40A5 Build- Part 1: Gathering the Parts

Gunsmithing
February 16, 2015 0

6.5 Creedmoor loads: 142 gr. and 140 gr. SMK with H4350

Cartridge Selection
August 6, 2017 0

Removing a stuck pull-through cleaning kit

Gunsmithing
February 28, 2021 0

Vang Comp Systems Ghost Ring Sight Installation

Gunsmithing
August 7, 2012 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)

How to flute a rifle barrel

Custom 1911 Project: Part 6- flat top and chain link top of slide

6.5 Creedmoor H4895 reduced loads: 123 SMK and 142 SMK

Custom 1911 Project: Part 2-undercut trigger guard


 

 

 

 

 

Customizing a Savage Model-10 Hunting Rifle

April 27, 2017 0

Fulton Armory M14 receiver

March 25, 2018 0

Remington 700 8-40 scope base conversion

October 15, 2014 0

Building (machining) an AR-15/M16 M4 barrel from a blank

May 13, 2014 0

Chambering a Rifle Barrel

March 6, 2013 0

Custom Remington 700 Build: Our twist on a light tactical rifle

March 11, 2013 0

Remington 870 3-Gun Competition Shotgun Conversion

July 29, 2012 0

Installing a short chambered barrel on a Remington 700

January 4, 2017 0

Changing the rear sight blade on a Smith and Wesson revolver

March 21, 2019 0

Glock firing pin channel removal and replacement

September 1, 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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