03-12-2013, 09:23 PM
Your ogives are engaging the rifling lands. Question on the AA upper: Does it say "Alex-A 6.5 GREN" on the left side of the upper receiver? IS the ejection port larger than a standard AR15?
Next question: Are there any barrel markings on the top or bottom of the fore-end of the barrel on the AA built upper?
From your description, it sounds like the chambers are short with land engagement, which should not be happening with AA loaded ammo and an AA gun. Can you use calipers to measure the Cartridge Overall Length of the unchambered factory ammo, as well as the one that was pulled out ~1/4" from the case and report those numbers for us?
Also, for future reference, if you don't already know, you can use the "mortaring" technique for extracting tough cases like this. Just be sure to fully collapse any telescoping stocks, and slightly impact the heel of the butt (not the toe, but the heel) on the ground while pulling on the charge handle.
![[Image: doublefeed1.jpg]](http://i1085.photobucket.com/albums/j422/LRRPF52/doublefeed1.jpg)
Next question: Are there any barrel markings on the top or bottom of the fore-end of the barrel on the AA built upper?
From your description, it sounds like the chambers are short with land engagement, which should not be happening with AA loaded ammo and an AA gun. Can you use calipers to measure the Cartridge Overall Length of the unchambered factory ammo, as well as the one that was pulled out ~1/4" from the case and report those numbers for us?
Also, for future reference, if you don't already know, you can use the "mortaring" technique for extracting tough cases like this. Just be sure to fully collapse any telescoping stocks, and slightly impact the heel of the butt (not the toe, but the heel) on the ground while pulling on the charge handle.