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Custom Mauser 257 Roberts Improved
Guns International #: 102265544 Seller's Inventory #:
Category: Mauser Rifles - Sporter Post-War - Custom Rifles
Seller's Information
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Seller: dgarvin1
Member Since: 12/9/10
State: Michigan
Zip: 49746
Country: United States
Seller: Private Seller
Return Policy: 3 day inspection and return policy on used guns.
3 days
Payment Types Accepted: Certified Check, Money order, Venmo, Paypal
About Us: Hello, I'm an outdoorsman and enthusiast from Michigan. Guns are from my private collection. My goal is to make the descriptions and pictures as accurate as possible. I don't own junk and I don't sell junk, so rest assured you're getting something nice. All of my rifles are in good working order. Any questions or concerns, please just ask!
Description:
Up for sale is a beautiful custom Mauser in 257 Roberts Improved. AAA walnut stock. Jeweled bolt. Mirror bright bore. Built on 1909 Argentine Mauser action. She’s accurate, even with standard 257 Roberts loads. Professionally built and exquisite! Comes with Leopold Vari-X 3x9. Minor handling marks, see pics. 23” bbl, 8.3lbs w/scope.
**+$50 shipping Lower 48
From Shooting Times:
According to P.O. Ackley, the modified 257 Roberts was likely the best improved round compared with the couple dozen or so factory cartridges he’d experimented with Ackley’s signature case modifications included reducing the body taper and increasing the shoulder angle—both significantly!
However, an even more important feature of the typical Ackley Improved (AI) wildcat is that he maintained the shoulder headspace datum of the parent factory round. That allows you to safely fire factory cartridges in the modified chamber. It also means you can easily fireform .257 Roberts factory brass or loaded rounds to achieve the .257 AI case shape, so you don’t need expensive forming dies or go through extensive case-forming steps.
Ned H. Roberts was one of several handloaders who experimented with wildcat cartridges in the 1920s and ’30s. He chose the 7x57mm Mauser case to modify and, reportedly, tested myriad configurations before settling on the “perfect” .25-caliber varmint and deer cartridge. Early articles by Townsend Whelen and Jack O’Connor proclaimed the virtues of the .257 Roberts in the hunting fields. Many hunting and reloading articles fondly referred to Ned Roberts’s wildcat as the “.257 Bob.”
When Remington decided to adopt it as a factory cartridge in 1934, the company made a few minor dimensional changes to preclude firing factory ammo in rifles chambered for the wildcat round. Remington paid homage to the inventor by naming the new factory round the .257 Remington Roberts. The Remington part of the moniker was eventually dropped.
The current SAAMI spec for the .257 Roberts Maximum Average Pressure (MAP) is 54,000 psi. Winchester introduced a +P version with a MAP of 58,000 psi in the mid-1980s. That’s still less than the typical 60,000 to 65,000 psi of comparable modern rifle cartridges.
SOLD
Rifle Caliber: .257 Roberts Improved
Manufacturer: Custom
Model: Mauser Sporter
Barrel Length: 23
Bore: Excellent
Chambers: Excellent
Ejectors: Excellent
Condition: Excellent
Metal Condition: Excellent
Wood Condition: Very good
Bore Condition: Excellent
Barrels: Excellent
Action: Excellent
Triggers: Excellent
Stock: Very good