August 23, 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
HomeIMR 8208 XBR

IMR 8208 XBR

Reloading

6.5 Grendel loads in a Howa MINIACTION (6.5 Grendel load development)

February 19, 2018 Bill Marr 0

While the 6.5 Grendel is well established in the AR-15/M16 M4, it’s compact size and perceived long range effectiveness have also made it a desirable choice for low-recoiling bolt-action rifles. Effectively a 6.5-7.62×39 with small […]

Reloading

6.5 Creedmoor load development: Sierra 107 TMK and Varget

February 10, 2018 Bill Marr 0

The current trend in precision rifles is towards longer and heavier rounds.  All too often I read about a new bullet like the 6.5mm 150 gr. Sierra MatchKing (SMK) and go crazy ordering faster twist […]

Cartridge Selection

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

July 11, 2017 Bill Marr 0

500 yards with a 223 Remington: Wood stock, solid pilot reamer and Shilen barrel… 223 Remington is a great cartridge that doesn’t get the recognition it deserves.  It is widely available in a myriad of […]

Bullet Selection

223 Ackley Improved (223AI) loads and review: A better 223?

November 28, 2016 Bill Marr 0

223 Ackley Improved: A better 223? Whether it’s simple curiosity or a desire to increase performance, exploring different cartridges is part of being a shooter.  One way to accomplish this is to purchase a new firearm. […]

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SHOT Show Media Day 2016 Photos

Pistols
January 18, 2016 0

USMC M40A5 Build- Part 4: Threading and chambering the barrel and brake installation

Gunsmithing
July 13, 2015 0

Building a custom 308 Winchester precision rifle: Howa 1500 action & MDT ESS chassis

Gunsmithing
January 4, 2018 0

Remington Arms “One at a time” 1969 Manufacturing Video

Gunsmithing
July 4, 2014 0

Does the MagnetoSpeed V3 chronograph change group size and point of impact?

Competition
March 8, 2018 0
308 Winchester / 7.62x51mm NATO: Barrel Length versus Velocity (28" to 16.5")
Budget precision rifle: Customizing the Savage Axis
6.5 Creedmoor- Effect of Barrel Length on Velocity: Cutting up a Creedmoor!
16.5 Inch 308 Winchester Precision Rifle: Summary of a Short Rifle
Building a Custom Ruger American Rifle
223 Remington/ 5.56mm NATO barrel length and velocity: 26 inches to 6 inches
Ruger American Rifle Predator 223 Review
223 Ackley Improved (223AI) loads and review: A better 223?
7.62x39 mm Russian: Effect of barrel length on muzzle velocity
Review: Remington 700 SPS Varmint

Review: Remington 700 SPS Varmint

6.5 Creedmoor load development: Sierra 130 grain Tipped MatchKing (TMK) with H4350, Varget, Reloder 15 and Reloader 17

Defiance Machine Deviant Receiver: Custom Remington 700 style action

Making a Foredom flexible shaft rotary tool stand


 

 

 

 

 

Making a custom screw: Savage Model 99 fore-end repair

May 12, 2019 0

Optics Survey

August 11, 2017 0

Building a Custom Ruger American Rifle

November 12, 2017 0

Eliminate milling machine backlash: Splitting a Bridgeport feed screw nut

March 7, 2015 0

6.5 Patriot Combat Cartridge (6.5 PCC) Review

November 21, 2014 0

Custom 1911 Project: Part 6- flat top and chain link top of slide

September 19, 2016 0

Custom 1911 Project: Part 1- getting started

August 29, 2016 0

Building a custom 308 Winchester precision rifle: Howa 1500 action & MDT ESS chassis

January 4, 2018 0

Quick rifle bedding tip: Easy removal of bedding material from pillars

July 19, 2015 0

Cerakote tip: Clean out your ejector hole before final assembly

July 26, 2014 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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