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
342: How Nosler Bullets Perform Afield With Cable Smith [not-audio_url] [/not-audio_url]

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341: Last chance to help me test some ammo! [not-audio_url] [/not-audio_url]

Duration: 4:56
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340: The best new rifle of 2024? [not-audio_url] [/not-audio_url]

Duration: 34:36
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339: Want to help me test some ammo? [not-audio_url] [/not-audio_url]

Duration: 7:23
Nosler just sent me a bunch of their new Whitetail Country line of ammunition and I need some help testing and evaluating how it performs afield this fall. Here's how you can help me out and potentially receive some free…
338: 338 Caliber Cartridges: The Ultimate Guide [not-audio_url] [/not-audio_url]

Duration: 1:59:45
I discuss all of the 33 caliber CIP and SAAMI standardized cartridges (plus a couple of other noteworthy rounds) in this episode and discuss their history, legacy, their strengths and weaknesses, and their recommended us…
337: I just punched my moose tag! [not-audio_url] [/not-audio_url]

Duration: 1:01:29
I just made it home from an outstanding moose hunt in Colorado with my son! We had an amazing trip and I successfully took a cow Shiras Moose, which was a species I wasn't sure I'd ever get to hunt because those tags are…
336: Best Cartridge for Hunting Darn Near Anything with Ron Spomer [not-audio_url] [/not-audio_url]

Duration: 1:14:40
Ron Spomer is back on the show and we discuss a subject I know you'll enjoy: our favorite cartridges for hunting virtually any species of big game. We're play little game where Ron and I each list our favorite cartridge…
334: 22 ARC Cartridge Profile [not-audio_url] [/not-audio_url]

Duration: 42:28
Today, we're talking about Hornady's new 22 Advanced Rifle Cartridge (22 ARC), which purports to deliver 22-250 level performance out of an AR-15 platform. In this episode I discuss whether or not Hornady delivers on tha…
333: About That Buffalo Roy Weatherby Shot With A 257 Weatherby... [not-audio_url] [/not-audio_url]

Duration: 58:41
As I promised you a couple of weeks ago, we're going to talk about the details I've been able to dig up regarding the often repeated story where Roy Weatherby supposedly killed a cape buffalo with the 257 Weatherby Magnu…