May 14, 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
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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308 Winchester load development: Sierra .308 195 gr. Tipped MatchKing (TMK) and VARGET

Bullet Selection
November 21, 2016 0

Building a Custom 308 Precision Chassis Rifle – PART 2- Barrel preparation and threading

308 Winchester
February 16, 2022 0

M24 Sniper Rifle Review

308 Winchester
October 30, 2022 0

VTAC L.U.S.A. Universal Sling Adapter Review

Reviews
September 12, 2011 0

Building a custom Tikka T3/T3X precision rifle

Gunsmithing
September 17, 2017 0
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!
Howa 1500 Review
223 Remington/ 5.56mm NATO barrel length and velocity: 26 inches to 6 inches
Review: Mossberg MVP Patrol 5.56mm NATO (223 Remington) and 7.62 NATO (308 Winchester)
Budget precision rifle: Customizing the Savage Axis
Colt M45A1 Review: USMC Pistol Review
Howa 1500 barreled action review: Howa 1500 versus Remington 700
Ruger American Rifle Predator 223 Review
M24 Sniper Rifle Review

Custom 1911 Project: Part 5- milling the slide for low mount sights

MDT XRS Chassis Review

Review: Howa MINIACTION 7.62×39

Installing an External Bolt Stop/Release on a Remington 700


 

 

 

 

 

6.5 Creedmoor load development: 16.5 inch barrel, 123 SMK and 140 SMK

March 28, 2016 0

Ruger 10/22 accuracy upgrade: Shortening factory chamber to improve accuracy

November 30, 2015 0

Ultimatum Precision redesigned bolt for the U300: reduced bolt lift

February 12, 2017 0

Review: Ruger American Rifle Predator 6 Creedmoor

March 18, 2017 0

1911 Front sight Installation

April 1, 2013 0

Changing the rear sight blade on a Smith and Wesson revolver

March 21, 2019 0

Remington 870 ejector spring replacement

April 6, 2019 0

Completing an 80% 10/22 Select Fire LLC RAZOR Semiautomatic Receiver

July 1, 2013 0

Marlin 1895 45-70 Brush Gun Build Part 1

November 5, 2012 0

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

May 27, 2013 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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