Why Oh WHy

[LRRPF52]

I just bought the last one of these. I couldn't resist the price.
I posted back in the spring how I would end up at 6x45.
https://truesportingarmsllc.com/product/...r-tc-mach/

This article influenced my decision. Now I need dies.
http://www.chuckhawks.com/6mm_military_cartridge.htm

Would there be a potential safety problem or will 6x45 not chamber in a 5.56 chamber?
I'm thinking it won't.

The 6x45 SAW we're talking about is a totally different cartridge than the 6x45 (6mm .223 variant).

6x45 SAW has a fatter case with 2.580" COL, optimized around a 105gr bullet with a high BC. The only things in common with 6x45 SAW and 6x45 are the numbers. Performance differences are quite considerable, as are the actions required to cycle each.

[Essayons]

I don't know if the USSR started from a blank slate when they developed this one, but here's another 6x49 solution: http://modernfirearms.net/en/machineguns...j-6mm-eng/ Can anyone here point me to more info on the USSR's 6x49 Unified Machinegun project?

[ATTACH=CONFIG]10489[/ATTACH]

[stanc]

I've not seen much info on the 6x49 beyond that on the page you linked.

TFB article: http://www.thefirearmblog.com/blog/2016/...m-unified/

IIRC Russki color codes, below are (from l. to r.) Ball, AP, API projectiles.



FYI, a 6x53 preceded the 6x49. Looked similar to the .243 Win (below).
Except the 6x53 case was a tiny bit fatter, and had a little more taper.

[stanc]

Speaking of Russian experimental cartridges, I came across pics of an interesting 7.62mm round developed circa 1962.
The 7.62x40 (also called 7.62x41) looks like 6.5 Grendel on steroids, and was reportedly intended to replace 7.62x54R.
Anyone who can read Russian may wish to check out the two magazine articles posted at: http://popgun.ru/viewtopic.php?f=281&t=257424&start=90