Same old story- I got a 300 from a guy and am having trouble making it run... It seems to all be AR-S parts, but not sure if it was factory or a build. I don't see the exact option available so I am assuming build rather than a complete upper. It is a 16" 1/8 twist with a pistol length gas tube. With that gas system and barrel I was expecting it to be over gassed but not sure if it is. Non-adjustable gas block, but it is properly lined up with the port.
It will run subs fine if I have a can on it- but if I pull the can it will have problems with about every 4th round. The round will be nose high with the bullet running into the top of the chamber and the bolt stopped on the body of the case. Not sure how it is getting enough purchase on the round to strip it 3/4 out of the mag and then skip over it? It is hitting hard enough that it will ripple the case mouth and some of the cartridges have a slight bend. That would make me think it was a mag or feed ramp issue if it wasn't for the fact that it runs perfect with a can.
So that makes me think it is a gas issue? I only had 1 box of super-sonic ammo and it ran them fine, but I can't remember if I had the can on or off with them. All I want to do is get it to run subs with no can-- just for a stay in the house defense gun that wouldn't over penetrate and probably never get used. It has a H1 buffer, I didn't weigh the whole thing- I pulled the weights out and the three of them were 1200 grains, so approx 2.75 ounces. Any advice?
It will run subs fine if I have a can on it- but if I pull the can it will have problems with about every 4th round. The round will be nose high with the bullet running into the top of the chamber and the bolt stopped on the body of the case. Not sure how it is getting enough purchase on the round to strip it 3/4 out of the mag and then skip over it? It is hitting hard enough that it will ripple the case mouth and some of the cartridges have a slight bend. That would make me think it was a mag or feed ramp issue if it wasn't for the fact that it runs perfect with a can.
So that makes me think it is a gas issue? I only had 1 box of super-sonic ammo and it ran them fine, but I can't remember if I had the can on or off with them. All I want to do is get it to run subs with no can-- just for a stay in the house defense gun that wouldn't over penetrate and probably never get used. It has a H1 buffer, I didn't weigh the whole thing- I pulled the weights out and the three of them were 1200 grains, so approx 2.75 ounces. Any advice?