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
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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6.5 Creedmoor load development: Semi-automatic gas gun, 140 SMK with VARGET and H4350

6.5 Creedmoor
March 18, 2018 0

Super Short Precision Rifles: Is there such thing as a 16.5″ .308 Tactical Bolt Action Rifle?

Rifles
November 15, 2013 0

The 270 in Africa

Bullet Selection
June 23, 2011 1

How do rifle suppressors affect muzzle velocity?

Precision Rifles
January 26, 2025 0

35 Whelen: That Whelen Fellin’ Again

Bullet Selection
June 23, 2011 2
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

MDT Ckye-Pod Review

Custom Cut Down Over and Under Shotgun

Review: Remington 700 SPS Varmint

Mossberg Patriot Review


 

 

 

 

 

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

August 22, 2016 0

Review: Ruger American Rifle Predator 6 Creedmoor

March 18, 2017 0

Remington 870 ejector spring replacement

April 6, 2019 0

Mossberg 500 rebuild

August 12, 2015 0

Bolton Gas Block Review

February 16, 2013 0

Gunsmithing: replacing a curved steel butt plate with a rubber recoil pad

November 25, 2020 0

Chamber Reamers

April 5, 2015 0

Building a custom Savage Model 10 in 6.5 Creedmoor

March 21, 2016 0

Advice for the amateur gunsmith

August 16, 2013 0

Custom Cut Down Over and Under Shotgun

July 30, 2020 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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