419: 257 Weatherby RPM With Richard Mann

419: 257 Weatherby RPM With Richard Mann

Author: John McAdams April 16, 2026 Duration: 52:50

Field & Stream shooting editor and 25 caliber aficionado Richard Mann joins me in this podcast episode to discuss the new, SAAMI standardized 257 Weatherby Rebated Precision Magnum. Richard discusses the origins of the 257 RPM, some of his experiences shooting and hunting with it, how it compares to the 25-06, 25 Creedmoor, and 257 Weatherby, and what the new Weatherby cartridge offers hunters.

Sponsor: Make sure you're signed up for my email list by going to Biggamehuntingpodcast.com/ebook. You'll get my free E-BOOK when you do so and you'll also receive the emails I send out every weekday. If you like The Big Game Hunting Podcast you'll love those emails. 

Join the Big Game Hunting Podcast tribe for the potential opportunity to have a future podcast guest answer one of your questions on the air along with access to all my bonus material at www.patreon.com/biggamehunter 

Please hit that "SUBSCRIBE" or "FOLLOW" button in your podcast app to receive future episodes automatically!

Resources

Rifle Cartridges for the Hunter – Richard Mann's book referenced in this podcast

Learn more about Richard by supporting him on Substack: Empty Cases Substack

Other Episodes Referenced In The Podcast

Ep 388: 25 Creedmoor-A Triple Threat Cartridge With Richard Mann

Ep 401: Best Cartridge For Hunting Darn Neary Anything By Richard Mann


John McAdams hosts the Big Game Hunting Podcast, a conversation grounded in the realities of pursuing game across continents. Each episode feels like a detailed campfire talk, moving from the technical specifics of terminal ballistics and caliber selection to the raw, unforgettable narratives from the field in Africa, North America, and beyond. McAdams brings together a global community, with voices ranging from seasoned industry professionals to fellow hunters who call in with their own experiences. The focus is always on practical knowledge and authentic stories, stripping away any pretense to get to the heart of what hunters actually want to discuss. By sharing his own journey of learning and improvement, McAdams creates a space where curiosity and respect for the wilderness drive the dialogue. Tuning into this podcast means joining a serious yet accessible exchange where the complexities of the hunt are explored without filter. New conversations are released every Thursday, offering a consistent dose of insight and camaraderie for anyone passionate about the pursuit.
Author: Language: English Episodes: 100

Big Game Hunting Podcast - Hunting Africa, North America, & More!
Podcast Episodes
BONUS: Vote For Me For Podcast Of The Year! [not-audio_url] [/not-audio_url]

Duration: 1:16
I am honored to be among those nominated for the Podcast of The Year award at the 2026 Gundies. Thank you to all of you who nominated me for this award. Voting for the Gundies begins TODAY, 1 December 2025 and I need you…
399: 8mm & 32 Caliber Cartridges: The Ultimate Guide [not-audio_url] [/not-audio_url]

Duration: 1:06:49
I discuss all of the 8mm and 32 caliber SAAMI standardized cartridges (plus a couple of other noteworthy CIP rounds) in this episode. As always, I'll talk about their history, design characteristics, performance specs, t…
398: 6.5mm Cartridges: The Ultimate Guide [not-audio_url] [/not-audio_url]

Duration: 1:47:40
I discuss all of the 6.5mm SAAMI standardized cartridges (plus a couple of other noteworthy CIP rounds) in this episode. As always, I'll talk about their history, design characteristics, performance specs, their strength…
397: An Elk Guide Shares His Favorite Elk Hunting Cartridges [not-audio_url] [/not-audio_url]

Duration: 1:25:18
Today, Rob Massa from the Bergara Academy and the R&K Hunting Company in Wyoming joins me on the show to discuss some observations he has made on what cartridges and bullets work and don't work from over 20 years outfitt…
396: 2025 Wyoming Elk Hunt Recap [not-audio_url] [/not-audio_url]

Duration: 1:02:11
I just made it home from an outstanding elk hunt in Wyoming! Despite some unique struggles, I had an amazing trip and I successfully took a beautiful bull elk. Today's episode is a detailed recap of this hunt, evaluation…
395: 22 Creedmoor vs 6.5 Creedmoor Caliber Comparison [not-audio_url] [/not-audio_url]

Duration: 1:03:21
John McAdams shares insights on the 22 Creedmoor vs 6.5 Creedmoor informed by real world data on obtained at the range, afield, and in ballistic gel in this podcast episode. John discusses the design characteristics, per…
393: Best Deer Hunting Ammo For 2025 [not-audio_url] [/not-audio_url]

Duration: 43:04
John McAdams shares three different recommendations for ammunition and bullets for deer hunters to use in 2025 informed by real world data on obtained at the range, afield, and in ballistic gel in this podcast episode. J…
392: 6.5 PRC vs 270 Winchester Caliber Comparison [not-audio_url] [/not-audio_url]

Duration: 54:01
The legendary 270 Winchester celebrates its 100th birthday this year in 2025. So, in honor of that impressive milestone, I conduct a deep dive comparing the venerable 270 Winchester to a much newer round with a more mode…
391: 7mm Backcountry, 277 Sig, & Seekins Precision With Matty Nelson [not-audio_url] [/not-audio_url]

Duration: 1:01:59
Matty Nelson, the director of business management for Seekins Precision, joins me on the show to talk about his company their hunting rifles. Of note, Seekins Precision was one of the first companies to pick up both of t…