300 BO not locking back

[djocon93]

There does not appear to be any gas leaking out around the gas block. So that's good news.

 

[djocon93]

How did you check if air was moving freely through the tube?

Gas key can be tight and you can still be losing gas from under it.

Plugged the champer with a spent cartridge, blew air through the muzzle and stuck my pinky up inside the upper to the belled end of the tube. Tons coming out the belled end.

 

[djocon93]

The bolt outrunning the mag is a rare phenomenon. Also, it wouldn't stop the bolt from locking to the rear when empty.

Isn't the bolt catch reliant on the mag follower to press it upwards in order to lock the bolt back? Not trying to be argumentative or anything I'm just trying to make sure I understand.

 

[cmshoot]

Isn't the bolt catch reliant on the mag follower to press it upwards in order to lock the bolt back? Not trying to be argumentative or anything I'm just trying to make sure I understand.

I have never seen a bolt run so fast that the bolt won't lack back.

When the spring is pushing up rounds to feed, it moves faster and faster as the load gets lighter and lighter. When it pushes up just the follower, after feeding the last round, that's faster than she's ever moved.

 

[djocon93]

I have never seen a bolt run so fast that the bolt won't lack back.

When the spring is pushing up rounds to feed, it moves faster and faster as the load gets lighter and light. When it pushes up just the follower, after feeding the round, that's faster than she's ever moved.

Ok that makes a lot of sense! Thanks!

 

[cmshoot]

Ok that makes a lot of sense! Thanks!

Of course, it may feed a little slower due to less tension on the spring! LOL

 

[bambam]

I have never seen a bolt run so fast that the bolt won't lack back.

When the spring is pushing up rounds to feed, it moves faster and faster as the load gets lighter and lighter. When it pushes up just the follower, after feeding the last round, that's faster than she's ever moved.

I find that interesting. What accounts for this action?

 

[cmshoot]

I find that interesting. What accounts for this action?

For the bolt running faster than the mag can feed?

 

[bambam]

You were saying that the follower moves fastest after the last round. I understand the the weight on top of the follower diminishes as the rounds are fed off. Is this not overcome by the increased force of the spring as it is loaded? Maybe the the follower moves slowest after the last round? A loaded magazine has a lot of frictional forces going on too so maybe this attributes to the phenomenon more than I am able to realize. I find this point interesting.

 

[Gingerbeard Man]

You have to blow harder on the bell end…