View Single Post
Old December 14, 2019, 01:23 PM   #69
Senior Member
Join Date: March 2, 2014
Posts: 7,176
Further quick examination and it became immediately apparent to me what the headspace fuss is all about without even taking measurements-- notice that the case head area from the base of the case to the rim face is much deeper on the 350 L than a standard 5.56, particularly the size of the extractor groove.

Looking at the extension, you can see that they added a significant radius to the chamber face (from what I can tell from dropping a cartridge in, the chamber support ends at the base of the case/top of the case head. Along with the single machined ramp at the bottom of the extension--which is what I see usually on single-stack big bore AR's--I'm assuming this is to allow for more reliable chambering of cartridges that are ingressing at an angle. I rarely see machined radius that big except on pistol cartridge carbines.

Attached Images
File Type: jpg IMG_2535.jpg (106.5 KB, 66 views)
File Type: jpg IMG_2536.jpg (181.6 KB, 62 views)
If you’re ever hiking in the woods and you get lost, just look up and find the brightest star in the sky and you’ll know which way space is.
I am NOT an expert--I do not have any formal experience or certification in firearms use or testing; use any information I post at your own risk!

Last edited by stagpanther; December 14, 2019 at 01:40 PM.
stagpanther is offline  
Page generated in 0.03012 seconds with 9 queries