April 24, 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
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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Sierra 6mm 110 SMK, 6 Creedmoor and 6×47 Lapua: initial impressions/load development

6 Creedmoor
December 18, 2016 0

5 Reasons to consider gunsmithing as a hobby

Gunsmithing
June 28, 2013 0

Review: Shooting the MAGPUL Ruger 10/22 Hunter X-22 Stock

Reviews
February 26, 2017 0

My bolt won’t close! Troubleshooting seized ejectors

Gunsmithing
November 24, 2019 0

Refreshing a poorly machined Remington 700 action

Gunsmithing
July 19, 2014 0
223 Remington/ 5.56mm NATO barrel length and velocity: 26 inches to 6 inches
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!
300 Winchester Magnum: How Does Barrel Length Change Velocity- A 16" 300 Win Mag?
Review: Mossberg MVP Patrol 5.56mm NATO (223 Remington) and 7.62 NATO (308 Winchester)
Building a Custom Ruger American Rifle
Ruger American Rifle Predator 223 Review
Budget precision rifle: Customizing the Savage Axis
Review: Howa MINIACTION 7.62x39
M24 Sniper Rifle Review

Building a 300 Winchester Magnum Precision Rifle

TRACT TORIC 4-20X50 UHD 30mm Rifle Scope Review

JEC Customs Recoil Reduction Muzzle Brake Review and Installation

Palmetto PA-10 Review: How accurate is a $400 AR-10?


 

 

 

 

 

AR-180 Magazines: Modifying AR-15/M16 M4 magazines to fit an AR-180

July 21, 2019 0

Cerakote USMC Red (H-167) rifle

February 3, 2016 0

223 Remington/ 5.56mm NATO barrel length and velocity: 26 inches to 6 inches

December 7, 2015 0

6.5 Creedmoor 136 grain Scenar-L OTM Load Development, H4350

August 1, 2015 0

Customizing the 1911: round butt Officer’s ACP conversion

November 1, 2016 0

Remington 870 ejector spring replacement

April 6, 2019 0

Add a detachable magazine to your Remington 700 by installing Surgeon bottom metal

September 20, 2013 0

Back bore a shotgun

August 5, 2015 0

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

May 27, 2013 0

Sheared screw removal (drill and back out method)

November 17, 2018 0

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Recent Posts
  • 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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