Was over on the SAAMI website to see if there was anything new and noticed a 400 Legend submitted by Winchester/Olin. I haven't seen any mention of this elsewhere other than people wishing it existed and can't seem to find any references, anyone else know something? https://saami.org/wp-content/uploads/2023/01/Public-Introduction-400-Legend-2023-01-30.pdf

No but have you seen the 360 Buck Hammer?

I did see the 360 Buck Hammer from a few different sources, sounds like Winchester wants to steal some of the spotlight back from Remington.

How many new mousetraps do we need?

6.5 Weatherby Rebated Precision Magnum
6.8 True Velocity Composite
30 Super Carry
338 Weatherby Rebated Precision Magnum
360 Buckhammer
400 Legend
429 Desert Eagle

Non belted Weatherby cartridges with rebated rims

Interesting, the 400 Legend does not appear to be based on the 223 Rem case like the 350 Legend is.

I'm not seeing any clear indication of what if any its parent cartridge was, it's not an extended 10mm Auto, it does have the same bullet diameter though.

First I’ve heard of it. Maybe a more modern version of a 401 Winchester?

How many versions of a ford V8 do we need? Surely nothing has changed in technology since 1932.

It looks like it has a 6.8 SPC case head, so I guess that'll simplify making bolts/magazines.

Seems like comparing apples and oranges to me. How much better is a 7mm08 than a 7x57? Now how about a flathead ford and. 5.0 coyote?

I made that one about a year ago , to add to my Bandit line of cartridges [ started over 25 years ago ] . The 45 Bandit became the 460 S&W and the 357 Bandit became the 350 Legend . I also have the 44 B and 500 B . The 40 bandit is based off of an altered 303 Brit case . Shortened , blown out straight and the rim cut off to rimless [ 6.8 size ] . It is set up for 200 - 220 grain pistol bullets and will for in an AR-15 . I figured it to be no big deal as it is only about 8 % more powerful than the .357 Bandit and the cases are much more work . I did post about it here a while back .

Wow I never would have guessed .303 British as the parent cartridge, seems like just about every dimension has changed.

That was the easiest case to get a slight taper and hold a 40 cal bullet . The case head size is the most important as you can not change that . Rims and extractor grooves are easy to change , as is the case length and blowing out shoulders . The 45 Bandit [ 460 ] was first made from 7.5x55mm Swiss . S&W added the little rim as they told me they did not want to use a moon clip , but they did anyhow on the 350 L version of the gun later . Since the cases on all of my Bandit cartridges headspaced on the case mouth , the thicker case neck wall formed from using the lower part of the rifle case helped .

A while back when I started those cartridges a hard part was making AR-15 mags to feed them . Now with so many mags being made in so many other cartridges it is easy to find one that will work with anything I come up with .

Sounds like a cool round.

Ron Spomer has a video out on this today.

I wonder how many of these new cartridges will be orphaned within 15 years? I’m a sucker for latest and greatest, but most of these are head scratchers.