25 Weatherby RPM

25 Weatherby RPM

Price range: $79.00 through $109.00

The 25 RPM follows the same design philosophy that made the 6.5 and 338 RPM such a standout performer. RPM stands for rebated precision magnum, a modern case design built to maximize performance in the lightweight Mark V 6 lug action. The idea is simple, create a magnum level cartridge that fits in a lighter, more compact rifle without sacrificing velocity or downrange capability.

CARTRIDGE SPECS

Bullet Diameter: .257 (6.35mm)
Common Reference: 25 Caliber
Max Case Length: 3.34”
Production Start: 2026

BALLISTIC INFO

View Additional Info Below

SKU: 25RPM Categories: , Tag:

Description

Ammunition Shipment Restrictions

Must be 18 or older to purchase rifle ammunition. Shipping not available to P.O. Boxes, International Addresses, AK, CA, HI, MA, CT, IL, NJ, NY nor DC residents. Residents of DE, KS, OH, and WA may have additional restrictions. All ammunition is shipped domestic ground and an adult signature is required. We do not accept returns on ammunition.

Ultra-high velocity and energy with our 6 lug action

The 25 RPM uses a large body diameter, low body taper, and a 35 degree shoulder. This modern case shape increases case capacity and improves overall cartridge efficiency, allowing the 25 RPM to push higher velocities than other 25 caliber options on the market.

By slightly shortening and modifying our proven 6.5 and 338 RPM case, we optimized the overall length for high BC, heavy for caliber bullets. These longer, more stable bullets are exactly where the 25 RPM shines, delivering incredible down range velocity, energy, and terminal performance.

The result is the most advanced 25 caliber cartridge available today, offering true magnum performance from the lightweight Mark V 6 lug platform while giving hunters and shooters mild recoil, flatter trajectories, harder hits, and better downrange consistency than any 25 caliber that has come before it.

LEARN MORE

Episode 135 - The 25 WBY RPM
On Our Mark Podcast

Episode 135 - The 25 WBY RPM

You guys have been asking for this one for a long time and today, it’s finally here: The 25 WBY RPM. This fast-twist quarter bore is made to sling modern heavy for caliber bullets farther and increase the effective range of the 25 caliber.

LISTEN NOW

Bullet Information

Barnes LRX

Barnes® LRX®

The Long-Range X Bullet (LRX) line is designed after the best-selling Tipped Triple-Shock X Bullet, the LRX bullet design increases Ballistic Coefficient values by increasing ogive and boat tail lengths to improve the bullets’ long-range ballistic performance. An all copper bullet with polymer tip that initiates expansion, causing the nose cavity to open instantly on contact doubling the bullet’s original diameter while creating four razor sharp cutting petals that wreak extensive internal damage and produce massive wound channels.

  • Common Reference – 25 Caliber
  • Bullet Diameter – .257 (6.35mm)
  • Bullet Weight – 117 gr.
  • B/C (G1) – .530 | (G7) – .259
  • Max Case Length – 3.34“

Barnes® LRX®

The Long-Range X Bullet (LRX) line is designed after the best-selling Tipped Triple-Shock X Bullet, the LRX bullet design increases Ballistic Coefficient values by increasing ogive and boat tail lengths to improve the bullets’ long-range ballistic performance. An all copper bullet with polymer tip that initiates expansion, causing the nose cavity to open instantly on contact doubling the bullet’s original diameter while creating four razor sharp cutting petals that wreak extensive internal damage and produce massive wound channels.

  • Common Reference – 25 Caliber
  • Bullet Diameter – .257 (6.35mm)
  • Bullet Weight – 117 gr.
  • B/C (G1) – .530 | (G7) – .259
  • Max Case Length – 3.34“

VELOCITY DATA (FPS)

Bullet WeightMuzzle100 yds200 yds300 yds400 yds500 yds
117 gr.315029602779260624392278

ENERGY DATA (FT LBS)

Bullet WeightMuzzle100 yds200 yds300 yds400 yds500 yds
117 gr.257722772003176415451348

BULLET TRAJECTORY (INCHES)

Bullet Weight100 yds200 yds300 yds400 yds500 yds
117 gr.3.1“3.8“0.0“-8.9“-23.7“

Berger Elite Hunter

Berger Elite Hunter

The Elite Hunter bullet is made with the longest possible hybrid ogive (nose). As the bearing surface ends, the tangent ogive begins, resulting in much less sensitivity to seating depth. As you move beyond the tangent ogive, the shape changes to a secant ogive, maximizing efficiency in the wind. The long-nosed Elite Hunter projectiles produce the highest possible Ballistic Coefficients. Elite Hunter bullets also incorporate a slightly thinner J4 Precision hunting jacket, which allows the projectile to penetrate 2″ to 3″ before rapidly expanding. Upon expansion, the projectile sheds most of its weight producing extreme hydrostatic shock and a massive wound cavity in the vital area. Berger Elite Hunter bullets dump their energy where it is most effective – inside the animal.

  • Common Reference – 25 Caliber
  • Bullet Diameter – .257 (6.35mm)
  • Bullet Weight – 133 gr.
  • B/C (G1) – .613 | (G7) – .315
  • Max Case Length – 3.34“

Berger Elite Hunter

The Elite Hunter bullet is made with the longest possible hybrid ogive (nose). As the bearing surface ends, the tangent ogive begins, resulting in much less sensitivity to seating depth. As you move beyond the tangent ogive, the shape changes to a secant ogive, maximizing efficiency in the wind. The long-nosed Elite Hunter projectiles produce the highest possible Ballistic Coefficients. Elite Hunter bullets also incorporate a slightly thinner J4 Precision hunting jacket, which allows the projectile to penetrate 2″ to 3″ before rapidly expanding. Upon expansion, the projectile sheds most of its weight producing extreme hydrostatic shock and a massive wound cavity in the vital area. Berger Elite Hunter bullets dump their energy where it is most effective – inside the animal.

  • Common Reference – 25 Caliber
  • Bullet Diameter – .257 (6.35mm)
  • Bullet Weight – 133 gr.
  • B/C (G1) – .613 | (G7) – .315
  • Max Case Length – 3.34“

VELOCITY DATA (FPS)

Bullet WeightMuzzle100 yds200 yds300 yds400 yds500 yds
133 gr.300028412689254123992261

ENERGY DATA (FT LBS)

Bullet WeightMuzzle100 yds200 yds300 yds400 yds500 yds
133 gr.265723842135190716991509

BULLET TRAJECTORY (INCHES)

Bullet Weight100 yds200 yds300 yds400 yds500 yds
133 gr.3.5“4.1“0.0“-9.5“-25.1“

Hammer Custom

Hammer Custom

Hammer Bullets™ are turned on a CNC lathe and use a unique solid copper blend that is designed for maximum terminal performance. Each bullet is weighed and micrometer measured as it is produced. The result is an incredibly consistent product with unparalleled quality control. The hollow point design, initiates expansion upon impact, shedding petals immediately, with the remainder of the bullet staying intact with a blunt front for optimal wound channel. All Hammer Custom Bullets are designed to optimize Weatherby’s flat shooting cartridges.

  • Common Reference – 25 Caliber
  • Bullet Diameter – .257 (6.35mm)
  • Bullet Weight – 107 gr.
  • B/C (G1) – .510 | (G7) – .257
  • Max Case Length – 3.34“

LEARN MORE

Episode 41 - Hammer Bullets
On Our Mark Podcast

Episode 41 - Hammer Bullets

Take a deeper dive into Hammer Bullets with our On Our Mark podcast. We sit down with Bryan and Steve of Hammer Bullets to talk about the performance and what makes Hammer bullets different from similar projectiles.

LISTEN NOW

Hammer Custom

Hammer Bullets™ are turned on a CNC lathe and use a unique solid copper blend that is designed for maximum terminal performance. Each bullet is weighed and micrometer measured as it is produced. The result is an incredibly consistent product with unparalleled quality control. The hollow point design, initiates expansion upon impact, shedding petals immediately, with the remainder of the bullet staying intact with a blunt front for optimal wound channel. All Hammer Custom Bullets are designed to optimize Weatherby’s flat shooting cartridges.

  • Common Reference – 25 Caliber
  • Bullet Diameter – .257 (6.35mm)
  • Bullet Weight – 107 gr.
  • B/C (G1) – .510 | (G7) – .257
  • Max Case Length – 3.34“

LEARN MORE

Episode 41 - Hammer Bullets
On Our Mark Podcast

Episode 41 - Hammer Bullets

Take a deeper dive into Hammer Bullets with our On Our Mark podcast. We sit down with Bryan and Steve of Hammer Bullets to talk about the performance and what makes Hammer bullets different from similar projectiles.

LISTEN NOW

VELOCITY DATA (FPS)

Bullet WeightMuzzle100 yds200 yds300 yds400 yds500 yds
107 gr.335031442948276125812409

ENERGY DATA (FT LBS)

Bullet WeightMuzzle100 yds200 yds300 yds400 yds500 yds
107 gr.266623492064181015821378

BULLET TRAJECTORY (INCHES)

Bullet Weight100 yds200 yds300 yds400 yds500 yds
107 gr.2.7“3.3“0.0“-7.9“-21.0“

Hornady SST

Hornady® SST®

The Hornady® SST® (Super Shock Tip) is designed to deliver tremendous shock on impact while expanding quickly and reliably, particularly at higher velocities. Flat shooting and deadly accurate, it’s an ideal bullet for whitetails, as well as most North American game animals from antelope to moose and similar‑sized African plains game. The SST® creates a devastatingly large wound channel.

  • Common Reference – 25 Caliber
  • Bullet Diameter – .257 (6.35mm)
  • Bullet Weight – 117 gr.
  • B/C (G1) – .390 | (G7) – .197
  • Max Case Length – 3.34“

Hornady® SST®

The Hornady® SST® (Super Shock Tip) is designed to deliver tremendous shock on impact while expanding quickly and reliably, particularly at higher velocities. Flat shooting and deadly accurate, it’s an ideal bullet for whitetails, as well as most North American game animals from antelope to moose and similar‑sized African plains game. The SST® creates a devastatingly large wound channel.

  • Common Reference – 25 Caliber
  • Bullet Diameter – .257 (6.35mm)
  • Bullet Weight – 117 gr.
  • B/C (G1) – .390 | (G7) – .197
  • Max Case Length – 3.34“

VELOCITY DATA (FPS)

Bullet WeightMuzzle100 yds200 yds300 yds400 yds500 yds
117 gr.315028952654242622102005

ENERGY DATA (FT LBS)

Bullet WeightMuzzle100 yds200 yds300 yds400 yds500 yds
117 gr.257721761830152912691044

BULLET TRAJECTORY (INCHES)

Bullet Weight100 yds200 yds300 yds400 yds500 yds
117 gr.3.4“4.2“0.0“-10.1“-27.3“
Hammer HBC Custom BulletsHornady® SSTBarnes LRXBerger Elite Hunter
Bullet Weight (grains)107117117133
B/C (G1).510.390.530.613
Velocity (Ft/Sec)
Muzzle3350315031503000
@100 yds3144289529602841
@200 yds2948265427792689
@300 yds2761242626062541
@400 yds2581221024392399
@500 yds2409200522782261
Energy (FT LB)
Muzzle2666257725772657
@100 yds2349217622772384
@200 yds2064183020032135
@300 yds1810152917641907
@400 yds1582126915451699
@500 yds1378104413481509
Trajectory (Inches)
@100 yds2.7“3.4“3.1“3.5“
@200 yds3.3“4.2“3.8“4.1“
@300 yds0.0“0.0“0.0“0.0“
@400 yds-7.9“-10.1“-8.9“-9.5“
@500 yds-21.0“-27.3“-23.7“-25.1“

25 WBY RPM

The 25 RPM uses a large body diameter, low body taper, and a 35 degree shoulder. This modern case shape increases case capacity and improves overall cartridge efficiency, allowing the 25 RPM to push higher velocities than other 25 caliber options on the market.

TRAJECTORY

Trajectory
Drop (in) vs Distance (yd)

VELOCITY/ENERGY

Velocity / Energy
fps + ft-lbs vs Distance (yd)

Shop Weatherby Unprimed Brass

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    Once Fired Brass 20 count

    $20.00
    Accessory Shipment Restrictions to California The California legislature recently passed Assembly Bill 1263, which puts additional regulations on the sale and shipment of firearm accessories. Unfortunately, this means that we will no longer be shipping these products to California addresses through our online website. If you would like to place [...]
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  • Unprimed Brass 20 Count
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    Unprimed Brass 20 Count

    Price range: $65.00 through $120.00

    20 rounds per box.

    Select options This product has multiple variants. The options may be chosen on the product page
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    Unprimed Brass 50 Count

    Price range: $105.00 through $185.00

    50 rounds per box.

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Additional information

Weight48 oz
Dimensions8 × 8 × 5 in
Bullet Options

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