Chamber issue

ScarlettRed

Private
PX Member
Minuteman
Aug 7, 2017
170
94
Colorado
Does anyone know if a new round should fully chamber by finger pressure or light forward assist preasure only. I have a scar17 and wanted to check ogives and can't get the bolt lugs to fully seat and rotate and lock up unless I pull the charging handle and let it go. These are new factory rounds. When I check bump gauge measurements new vs fired, they stretch 10 to 15 thousanths. I expect some stretch, not sure if that is normal. Is a 7.62 Chamber much different than a 308?
 

ScarlettRed

Private
PX Member
Minuteman
Aug 7, 2017
170
94
Colorado
Also, what the hell is this? I always get this secondary neck/shoulder line after firing. The gun is very accurate , but not being able to find an ogive is nuts.
 

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