June 17, 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
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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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Bolt action rifle muzzle brake installation: Installing a Surefire MB762SSAL/RE

Accessories
May 27, 2013 0

Defensive Shotgun Patterning: Deconstructing the one inch per yard myth

New
January 27, 2013 0

Badger Ordnance M16-Style Extractor Installation on a Remington 700

Gunsmithing
April 3, 2015 0

Modular Driven Technologies (MDT) HS3 Chassis Review: Initial Thoughts

Precision Rifles
January 24, 2015 0

Mossberg 590 Choke Installation

Gunsmithing
September 8, 2018 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!
308 Winchester/ 7.62x51mm NATO Short barrel length and velocity- A six inch 308 bolt gun?
300 Winchester Magnum: How Does Barrel Length Change Velocity- A 16" 300 Win Mag?
6 Creedmoor barrel length versus muzzle velocity (31 to 17 inches)
Budget precision rifle: Customizing the Savage Axis
7.62x39 mm Russian: Effect of barrel length on muzzle velocity
223 Ackley Improved (223AI) loads and review: A better 223?
M24 Sniper Rifle Review

Annealing brass for reloaders

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

Making a Foredom flexible shaft rotary tool stand

Brownells AR-15 10 Round Magazines


 

 

 

 

 

Tuffy Security Products Heavy Duty Truck Bed Security Drawer Review

December 16, 2021 0

AR-10/ 308 AR Barrel nut removal

September 2, 2018 0

Henry Long Ranger review

July 11, 2017 0

300 BLK load development: 125, 135, 175 and 220 SMK with H110 and IMR 4227

June 1, 2016 0

Remington Model 4, 742, 7400 disassembly notes

December 15, 2019 0

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

March 11, 2013 0

Troubleshooting a .308 rifle

October 12, 2014 0

Building a Custom Ruger American Rifle

November 12, 2017 0

Cut and crown a shotgun barrel

April 30, 2020 0

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

October 2, 2018 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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