398: 6.5mm Cartridges: The Ultimate Guide

398: 6.5mm Cartridges: The Ultimate Guide

Author: John McAdams November 20, 2025 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 strengths and weaknesses, and their recommended uses in detail. Where appropriate, I'll also share some personal anecdotes involving these rounds as well as some observations involving various cartridges by noteworthy gun writers as well.

Cartridges covered: 6.5x52mm Carcano, 6.5×55 Swede, 6.5x57mm, 6.5x50mm Japanese, 6.5x54MS, 6.5-06, 264 Winchester Magnum, 6.5mm Remington Magnum, 260 Remington, 6.5-284 Norma, 6.5 Grendel, 6.5 Creedmoor, 26 Nosler, 6.5-300 Weatherby, 6.5 PRC, 6.5 Weatherby RPM

Sponsor: Support me on Patreon to see the terminal ballistics analysis of the Kennedy assassination (which involved one of these rounds discussed in this episode) conducted by an experienced trauma surgeon. Supporters also receive access to my other bonus material.

The Third Bullet by Stephen Hunter

Rifle Cartridges For The Hunter by Richard Mann

Resources

Episode 172: 6.5 Creedmoor vs 300 Win Mag For Elk Hunting

Episode 282: 6.5 Creedmoor For Grizzly Bear?!

Episode 366: Modern Cartridge Design With John Snow

Episode 286: 30 Caliber Cartridge Roll-Up

Episode 291: 270 Caliber Cartridge Roll-Up

Episode 297: 9.3mm and 375 Caliber Cartridge Roll-Up

Episode 300: 40 Caliber Safari Cartridge Roll-Up

Episode 328: 25 Caliber Cartridge Roll-Up

Episode 329: 50, 60, & 70 Caliber Safari Cartridges With Kevin Robertson

Episode 338: 338 Caliber Cartridge Roll-Up

Episode 345: 7mm Cartridge Roll-Up

Episode 345: The "Other" 30 Caliber Cartridges: 303 British, 7.x62x54R, etc.

Episode 358: 35 Caliber Cartridge Roll Up


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
419: 257 Weatherby RPM With Richard Mann [not-audio_url] [/not-audio_url]

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 2…
417: Double Rifles, 500 NE & Elephant Charges With Jeff Rann [not-audio_url] [/not-audio_url]

Duration: 1:06:26
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416: 416 Caliber Cartridges With Terry Wieland [not-audio_url] [/not-audio_url]

Duration: 1:46:24
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415: 10 Best African Safari Book Recommendations For Hunters [not-audio_url] [/not-audio_url]

Duration: 23:24
Today, I'm unveiling my definitive list of what I think are the 10 greatest African hunting books ever written. This list of African safari book recommendations includes works from people like Hemingway, Roosevelt, Ruark…
414: Leopard Mauling To Sudan Bongo Hunts with Robin Hurt [not-audio_url] [/not-audio_url]

Duration: 1:03:14
Legendary Professional Hunter Robin Hurt joins me on the show today as we discuss some of his adventures hunting all over Africa like Kenya, Tanzania, Uganda, Sudan, Zaire, Zambia, and Namibia. As you can imagine from a…
412: Stories From The African Bushveld With Johan Seyffert [not-audio_url] [/not-audio_url]

Duration: 38:35
I sat down with Johan Seyffert, one of my South African Professional Hunters, at the 2026 Safari Club International convention and recorded a short interview about some of his more memorable hunts from 2025, some funny a…
411: 458 Win Mag vs 45-70 Govt Cartridge Comparison [not-audio_url] [/not-audio_url]

Duration: 1:28:59
Here's how the mighty 458 Winchester Magnum stacks up against the venerable 45-70 Government cartridge, especially with regards to how both perform in Africa. In this episode, we discuss the history, design characteristi…