June 5, 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
Home300 BLK

300 BLK

300 BLK

300 BLK accuracy problems? Maybe it isn’t you…

August 17, 2016 Bill Marr 0

The ability to shoot 30 caliber bullets from a standard AR-15 M16/M4 style rifle by simply changing the barrel and ammunition has made the 300 AAC Blackout (300 BLK) a popular choice for AR shooters looking […]

300 BLK

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

June 1, 2016 Bill Marr 0

The 300 AAC Blackout (300 BLK) is a popular alternative cartridge in the AR-15/M16 M4 (AR) community.  Known for its ability to deliver heavy subsonic bullets for standard AR magazines while cycling the action in suppressed applications, […]

300 BLK

Building a custom 300 Blackout (BLK) Precision Rifle

April 11, 2016 Bill Marr 0

Since its approval by SAMMI in 2011, the 300 AAC Blackout (abbreviated 300 BLK) has been a popular choice with shooters.  Often recognized as the go to choice for suppressed applications with heavy subsonic loads; […]

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Fortune Favors The Brave….Even When Outnumbered

Editorial
April 23, 2017 0

Shotgun Duckbill Review: Paradigm’s GATOR

Reviews
July 9, 2017 0

243 Winchester- Effect of barrel length on velocity

Barrel length
April 19, 2016 0

USMC Combat Pistol Program history and development

Editorial
April 13, 2017 0

USMC M40A5 Build- Part 5: Bedding and final assembly

Gunsmithing
December 16, 2015 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")
223 Remington/ 5.56mm NATO barrel length and velocity: 26 inches to 6 inches
Budget precision rifle: Customizing the Savage Axis
300 Winchester Magnum: How Does Barrel Length Change Velocity- A 16" 300 Win Mag?
308 Winchester/ 7.62x51mm NATO Short barrel length and velocity- A six inch 308 bolt gun?
7.62x39 mm Russian: Effect of barrel length on muzzle velocity
Ruger American Rifle Predator 223 Review
M24 Sniper Rifle Review
6 Creedmoor barrel length versus muzzle velocity (31 to 17 inches)

Short Rifle, Long Range: Testing our 16.5″ 308 Remington 700 out to 635 yards

Customizing the 1911: machining a golf ball pattern slide

Chambering a rifle for an Ackley Improved Cartridge

Rogers Single Point M4 Rifle Harness Review


 

 

 

 

 

500 yards with a 223 Remington: Wood stock, solid pilot reamer and Shilen barrel…

July 11, 2017 0

Customizing a Savage B.Mag Target Rifle

February 7, 2022 0

AR15 Barrel Threading

December 26, 2012 0

Making a Foredom flexible shaft rotary tool stand

December 15, 2019 0

Budget precision rifle options? Custom rigs for a mid-range budget

October 3, 2016 0

Machining front cocking serrations on a Glock slide

July 29, 2015 0

Custom 1911 Project: Part 2-undercut trigger guard

September 1, 2016 0

Building a custom 260 Remington precision rifle

November 14, 2013 0

Tactical Operations bolt knob installation on a Remington 700

March 14, 2017 0

Installing a recoil pad on a fiberglass stock

January 30, 2017 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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