April 12, 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
Home308 barrel length accuracy

308 barrel length accuracy

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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Review: Paul Howe Advanced Tac Pistol/Rifle Operator DVD

New
May 19, 2012 0

Reloading 101: Measuring group size and converting to MOA

Precision Rifles
August 11, 2016 0

Schmidt & Bender 5-25×56 PM II SFP Review

Optics
May 21, 2017 0

Glue on recoil pad installation

Gunsmithing
November 23, 2019 0

How to flute a rifle barrel

Gunsmithing
February 3, 2014 0
6.5 Creedmoor- Effect of Barrel Length on Velocity: Cutting up a Creedmoor!
308 Winchester / 7.62x51mm NATO: Barrel Length versus Velocity (28" to 16.5")
Budget precision rifle: Customizing the Savage Axis
223 Ackley Improved (223AI) loads and review: A better 223?
Howa 1500 barreled action review: Howa 1500 versus Remington 700
Ruger American Rifle Predator 223 Review
223 Remington/ 5.56mm NATO barrel length and velocity: 26 inches to 6 inches
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)
USMC M40A5 Build- Part 1: Gathering the Parts

Custom Remington 870 Wingmaster Build

A quick look: Atlas Tactical Action for 338 Lapua

Battle Arms Development Ambidextrous Safety Selector (BAD-ASS) Review

Remington 700 sheared screw removal


 

 

 

 

 

6.5 Creedmoor Barrel Speed: Can shorter barrels shoot faster?

November 25, 2019 0

308 Winchester Barrel Length and Velocity: Winchester 147 grain FMJ

January 24, 2015 0

AKARS Holds Zero- Part 3

February 19, 2013 0

Mossberg 590 Shockwave 20-gauge buckshot selection and patterning

January 21, 2018 0

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

August 6, 2017 0

Cut and Crown a Winchester 94 30-30

February 28, 2023 0

Remington 700 SPS 243 Win to 6 Creedmoor conversion: Budget precision rifle

August 22, 2016 0

Building a custom 6.5 Creedmoor bolt action pistol

June 13, 2016 0

Build a Remington 700 bolt disassembly tool

March 5, 2015 0

Building a custom 7mm Rem Mag Hunting Rifle-PART 2

July 31, 2022 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
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