June 1, 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
HomeProof Research

Proof Research

6.5 Creedmoor

6.5 Creedmoor loads: 107 SMK IMR 8208 XBR and 142 SMK Superformance

August 21, 2017 Bill Marr 0

6.5 Creedmoor loads: 107 SMK IMR 8208 XBR and 142 SMK Superformance 6.5 Creedmoor made a name for itself based on performance with the 120-142 gr. class bullets.  Unlike older cartridges such as the 308 […]

Cartridge Selection

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

August 6, 2017 Bill Marr 0

6.5 Creedmoor loads: 142 gr. and 140 gr. SMK with H4350 I hate to say it, but I guess I drank the 6.5 Creedmoor Kool-Aide.  I’ve posted quite a bit of load development for the […]

Competition

A look at how rifle barrels speed up: Measuring the increase of muzzle velocity in new barrels

July 31, 2017 Bill Marr 0

A look at how rifle barrels speed up: Measuring the increase of muzzle velocity in new barrels Seasoned shooters and barrel makers will often tell you new rifle barrels speed up.  Normally they say something […]

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Bob Marvel Custom 1911 Classes

Gunsmithing
August 5, 2014 0

Installing Venom’s Antidote muzzle brake & tactical gas block on an AK (Kalashnikov) barrel- cut, crown and thread an AK barrel

Gunsmithing
May 27, 2013 0

6.5 Creedmoor load development: Reloder 17 and 140 gr. Sierra MatchKing (SMK) #1740

6.5 Creedmoor
June 19, 2017 0

MagnetoSpeed V3 versus Oehler 35P: Chronograph comparison and review

Accessories
November 23, 2015 0

6.5 Creedmoor- Effects of Barrel Length on Velocity 2019

6.5 Creedmoor
March 10, 2019 0
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
6.5 Creedmoor- Effect of Barrel Length on Velocity: Cutting up a Creedmoor!
223 Ackley Improved (223AI) loads and review: A better 223?
7.62x39 mm Russian: Effect of barrel length on muzzle velocity
300 Winchester Magnum: How Does Barrel Length Change Velocity- A 16" 300 Win Mag?
Budget precision rifle: Customizing the Savage Axis
308 Winchester/ 7.62x51mm NATO Short barrel length and velocity- A six inch 308 bolt gun?
243 Winchester- Effect of barrel length on velocity
6.5 Creedmoor- Effects of Barrel Length on Velocity 2019

6.5 Creedmoor load development: Semi-automatic gas gun, 130 and 107 TMK

Remington 870 extractor identification: MIM v. bar stock

Rifle stock or chassis?

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


 

 

 

 

 

Howa GRS Berserk 6.5 Creedmoor Review

May 9, 2017 0

Aimpoint T1 Micro 2MOA Review

November 1, 2012 0

How to bobtail a 1911

December 11, 2017 0

Customizing the 1911: round butt Officer’s ACP conversion

November 1, 2016 0

Glock 36 Review

February 23, 2013 0

Custom Remington 700 223 Wylde

August 6, 2014 0

1911 Rear Sight Installation (Novak style cut)

March 23, 2013 0

External Remington 700 bolt stop- no step cut installation- method 2

July 18, 2013 0

My bolt won’t close! Troubleshooting seized ejectors

November 24, 2019 0

Savage smooth barrel nut removal

May 5, 2019 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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