The 257 Roberts ammo for sale is a rifle cartridge introduced by Remington Arms in 1934. It is designed as a versatile round suitable for several applications like; varmint hunting, target shooting, and hunting medium-sized games. Additionally, it fires a .257-inch diameter bullet with common bullet grains of 75 to 120 grains. As a result, the bullets shots at a muzzle velocity of 2,700 to 3,500 ft/s depending on the bullet weight and brand.

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This article will provide relevant information on the 257 Roberts and which ammo category fits your specific needs.


As mentioned above, the 257 Roberts ammo is a cartridge the Remington Ammo company developed. This bullet type is also called the 257 Bob. We will frequently use it interchangeably with the 257 Roberts ammo in this article.

Initially, this cartridge was conceptualized to serve as a middle ground between the high energy but harder recoil of larger, more widely used hunting calibers, such as the 7mm (.28 in) family and the well-known 7.62 mm (.30 in), and the low recoil and flat trajectory of smaller calibers like the 5mm (.22 in) and 6mm (.24 in).

Because the 257 Roberts ammo is highly accurate with a low recoil and flat trajectory, it is mainly used for hunting and target shooting where these characteristics are needed. It is notably used for hunting varmints and medium-sized games. Specifically, this ammo is used for hunting, target shooting, and varmint hunting as follows;

  1. Firstly, for varmint hunting, the 257 Roberts ammo makes use of its high velocity and light bullet weight property to effectively take down small animals like coyotes, groundhogs, and prairie dogs at moderate ranges;
  2. Secondly, when it comes to target shooting, the 257 Bob ammo has a low recoil and accuracy that is excellent for informal target and long-range shooting competitions;
  3. Finally, the 257 Robert ammos heavy bullet weigh option which produces high velocities, is suitable for taking down medium-sized games like deer, antelope, and sheep at moderate ranges. Most importantly, this bullet type is not ideal for big games like elk or moose.

In other words, the .257 Roberts ammo is a versatile and practical choice for a wide range of shooting applications. Place your order for this accurate and performance load at our store today. Buy now!


  1. Case type; Rimless, bottlenecked
  2. Parent case: .7x57mm Mauser
  3. Case length; 56.7 mm (2.233 in)
  4. Overall length; 70.5 mm (2.775 in)
  5. Bullet diameter; 6.5 mm (.257 in)
  6. Base diameter; 12.0 mm (.472 in)
  7. Neck diameter; 7.4 mm ( .290 in)
  8. Rim diameter; 12.0 mm (.473 in)
  9. Shoulder diameter;10.9 mm (.430 in)
  10. Primer type; Large rifle
  11. Rifling twist; 1-10″


The ballistics of the .257 Roberts load can vary depending on the specific load used, the type of firearm it is fired from, and other factors.

However, a typical .257 Roberts ammo generally fires a bullet weighing about 100 grains at a muzzle velocity of 2,800 to 3,000 ft/s. This velocity results in a muzzle energy of approximately 2,000 to 2,500 ft-lbf.

For instance, at 100 yards (91 meters), the bullet generally has a velocity of 2,500 to 2,700 ft/s and travels at a speed of 1,900 to 2,200 ft-lbf. Equally, at 200 yards (183 meters), the velocity will be 2,200 to 2,400 ft/s with an energy of 1,500 to 1,800 ft-lbf.

Generally, the 257 Bob ammo has a flat trajectory making it an effective cartridge for long-range shooting.


The effective range of the 257 Roberts bullet depends on the specific load used, the type of firearm it is fired from, and the shooter’s skills. However, generally speaking, the effective range of this load is 300-400 yards for hunting and target shooting.

At ranges beyond 400 yards, the bullet loses velocity and energy, making it less effective. Nevertheless, the 257 Robert load can deliver accurate and effective shots at longer ranges with the correct ammunition and firearm.

It is worth noting that the effective range of any round can be affected by environmental factors. Some of these factors are wind, temperature, humidity as well as the skill and experience of the shooter. As a result, it is essential to practice and develop accurate shooting skills to maximize the effectiveness of the 257 Roberts ammo and other cartridges at longer ranges.


There are several advantages to using the 257 Robert Ammo. Some of which:

  1. Versatility: This round is known for its versatility as it can be used in a variety of situations, including varmint hunting, target shooting, and hunting;
  2. Accuracy: The 257 Roberts round is known for its accuracy and flat trajectory, which is vital for long-range shooting;
  3. Recoil: The recoil of the 247 Roberts ammo is lighter than other of other ammunition of the same caliber making it comfortable to shoot;
  4. Availability: This ammo is readily available and inexpensive. You can find the best quality of this ammo at our shop


The 257 Roberts ammo for sale history dates back to the 1930s. During this period, Ned Roberts, gun writer and hunter, developed the 257 Robert ammo by necking down the 7.57mm Mauser case to accept .257 caliber bullets. This new resulted in a high-velocity round for target shooting and varmint hunting.

In addition, the Robert ammo has bullet gain popularity among hunters and shooters due to its flat trajectory, accuracy, and effectiveness. Moreover, despite its long age, this load has remained respected and versatile.


Therefore, if you need a versatile, accurate, light recoil, reliable, and effective medium-sized game round, the 257 Roberts bullet is the round you need. Look no further than our online store for quality ammunition at affordable prices. We offer significant discounts on bulk orders along with free shipping.

Place your orders now.

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