Reloading Podcast 238 - more questions

Hello, and welcome to the Reloading Podcast here on the Firearms Radio Network.  

Tonight the guys are answering some questions.

  1. Corey posted in RLP Not a reloading question but before i spend $2,200 on a vortex razor HD gen ii scope. Is there any other scope i should consider around the same price range?

  2. Bryan posted in Matter of Facts Podcast Group: Andrew and Matt, and anyone else with experience or input, I have a few questions regarding my recently acquired 300 blackout.

    First, it doesn’t want to cycle subsonic rounds. It seems like it is not getting enough gas to bring the bolt back far enough to pick up the next round. I have tried to run two different brands of subs through it with the same results. What do you think is causing the issue and what should be my next step to fix it?

    And secondly, the cases that are being ejected have a flat spot at the head of it. I’ll attach a picture for reference. Is this something I should be concerned about, or is it normal behavior?

Cartridge Corner Notes: .257 Weatherby Magnum

From Wikipedia, the free encyclopedia

The .257 Weatherby Magnum is a .257 Caliber (6.35 mm) belted bottlenecked cartridge. It is one of the original standard length magnums developed by shortening the .375 H&H Magnum case to approx. 2.5 in (64 mm). Of the cartridges developed by Roy Weatherby, the .257 Weatherby Magnum was known to have been his favorite, and the cartridge currently ranks third in Weatherby cartridge sales, after the .30-378 Weatherby Magnum and the .300 Weatherby Magnum.[2]

The .257 Weatherby Magnum is among one of the flattest shooting commercial cartridges. It is capable of firing a 115 gr (7.5 g) Nosler Ballistic Tip bullet at 3,400 ft/s (1,036 m/s) generating 2,952 ft⋅lbf (4,002 J) of energy[3] which is comparable to factory loadings of the .30-06 Springfield and the .35 Whelen in terms of energy.

Discrepancies between the metric and U.S. diameters of the bullet may cause some confusion. A .257 bullet has a metric bullet diameter of 6.53 mm. However, in Europe cartridge designation nomenclature for a large part relies on the bore diameter. As the bore diameter of the rifle is .250 inches this would make the .257 Weatherby Magnum a 6.35 mm caliber cartridge rather than a 6.5mm caliber cartridge.

Type of cartridge Rifle

Place of origin United States

Production history

Designer Roy Weatherby

Designed 1944

Manufacturer Weatherby

Produced 1948 – present


Parent case .375 H&H Magnum

Bullet diameter .257 in (6.5 mm)

Neck diameter .283 in (7.2 mm)

Shoulder diameter .492 in (12.5 mm)

Base diameter .512 in (13.0 mm)

Rim diameter .5315 in (13.50 mm)

Rim thickness .051 in (1.3 mm)

Case length 2.545 in (64.6 mm)

Overall length 3.209 in (81.5 mm)

Case capacity 84 gr H2O (5.4 cm3)

Rifling twist 1 in 10 in (250 mm)

Primer type Large Rifle (magnum)

Maximum pressure 65,000 psi (450 MPa)

Ballistic performance

Bullet mass/type Velocity Energy

87 gr (6 g) SP………..3,825 ft/s (1,166 m/s) 2,826 ft⋅lbf (3,832 J)

100 gr (6 g) SP……….3,602 ft/s (1,098 m/s) 2,881 ft⋅lbf (3,906 J)

117 gr (8 g) BST..........3,400 ft/s (1,000 m/s) 2,952 ft⋅lbf (4,002 J)

120 gr (8 g) Partition...3,305 ft/s (1,007 m/s) 2,910 ft⋅lbf (3,950 J)

Test barrel length: 26

Source(s): Weatherby [1]


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