September 19, 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
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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6.5 Creedmoor load development: Semi-automatic gas gun, 130 and 107 TMK

6.5 Creedmoor
February 11, 2018 0

BEEZ Combat System Short Barrel Scabbard: A better way to carry your TAC-14/Shockwave

Accessories
November 24, 2017 0

Installing Novak sights on a PPK /PPK CLONE

Gunsmithing
May 19, 2019 0

1911 Front sight Installation

Gunsmithing
April 1, 2013 0

USMC M40A5 Build-Part 2: Lug slotting the receiver

Gunsmithing
April 19, 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
Howa 1500 barreled action review: Howa 1500 versus Remington 700
M24 Sniper Rifle Review
6 Creedmoor barrel length versus muzzle velocity (31 to 17 inches)
Review: Remington 700 SPS Varmint
243 Winchester- Effect of barrel length on velocity
308 Winchester/ 7.62x51mm NATO Short barrel length and velocity- A six inch 308 bolt gun?

Ruger Precision Rifle Suppressed Load Development: Hornady 147 ELD-Match and H4350 with THUNDER CHICKEN

Brownells AR-15 10 Round Magazines

Remington 870 magazine dimple removal

6.5 Creedmoor loads: 123 SMK and 130 TMK with VARGET


 

 

 

 

 

AR-180 Magazines: Modifying AR-15/M16 M4 magazines to fit an AR-180

July 21, 2019 0

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

May 27, 2013 0

Turnbull Restoration and Manufacturing on “How it’s Made”

March 6, 2015 0

Customizing a Savage B.Mag Target Rifle

February 7, 2022 0

The scout rifle: a one gun solution?

June 11, 2017 0

AR15 Rebuild Build: Updating the Musket

September 12, 2011 0

Customizing a Savage B.Mag Target Rifle

February 7, 2022 0

Muzzle Brake Installation on a Precision Rifle: Timing and Installing an OPS R3E2C

December 1, 2013 0

3-Gun Rifle Build

November 24, 2012 0

Mossberg 590 Choke Installation

September 8, 2018 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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