Failure to eject - Defiance Ruckus - 338LM - heavy bolt lift

[CEO10KaDAY]

I’m getting nothing but failure to eject. The bolt gets stuck at the top and if I force it, the ejector skips over the rim of the case and it fails to eject.

I have to grab the cleaning rod and hammer it out after each time. Problem is, I’m using a very light charge.

specs:
30 inch barrel + huxwrx flow through can
Defiance ruckus action

Lapua brass
300 gr 338 OTM
81 gr of retumbo
3.055 inches base to ogive.

Every time it gets stuck: as video shows (via YouTube)




Not sure what’s going on? I know I’m no where near max pressure. Case gets stuck even without suppressor on too.

 

[CEO10KaDAY]

I just shot some 250 grains that I know were a hotter load and they ejected just fine.

Any ideas guys? Thank you.

I also just shot some older 300gr Bergers I’ve had for over a year now too. Almost identical seating depth, but it was with 91 grains. No issue ejecting.

 

[spife7980]

You mean it’s not extracting, it’s stuck in the chamber.

Measure your brass, base shoulder neck diameters on the virgin/sized vs the fired.

Do the case rims get mangled where the extractor slid off? Being a rukus it should have an m16 I think.

 

[CEO10KaDAY]

I’ll do that when I get home. Does it matter how many times the case has been used? Some of these if not most are probably on 17-19 times fired.

 

[CEO10KaDAY]

Picture of dog for taking the time to read/help

 

[JAS-SH]

Chamber too tight. The brass always expands and then springs back (as designed) for extraction. In your case it is still larger than the chamber as reamed and gets stuck. We are talking thousands of an inch.

 

[camotoe]

Should've got a Savage.....

 

[CEO10KaDAY]

Chamber too tight. The brass always expands and then springs back (as designed) for extraction. In your case it is still larger than the chamber as reamed and gets stuck. We are talking thousands of an inch.

It’s not a seating depth problem either? I was nervous I measured jam wrong.

I measured jam at 3.07 inches base to ogive. So started my seating depth at 3.05.

I can try extending another 5 thousandths?

But at the end of the day, 81 gr of retumbo is a very mild load

 

[JAS-SH]

It’s not a seating depth problem either? I was nervous I measured jam wrong.

I measured jam at 3.07 inches base to ogive. So started my seating depth at 3.05.

I can try extending another 5 thousandths?

But at the end of the day, 81 gr of retumbo is a very mild load

Too long a sitting depth gives you a hard bolt close. Nothing to do with extraction - bullet's already gone.... Powder charge within operating range does not matter either. Hard extraction means a problem between the chamber and the fired case. Not rocket science. Either too hot a load or a small for caliber spec chamber.

 

[CEO10KaDAY]

My point was that a longer seating depth is less pressure.

I guess I need more neck tension to shoot 20x fired brass?

 

[ShtrRdy]

Was the brass you're using shot in THAT rifle?

 

[Cynical]

Looks like one hell of a clicker. Then, if you force the bolt on primary extraction, it’s ripping the case rim. I think the problem is brass that’s reached end of life or needs significant sizing near the base.

 

[CEO10KaDAY]

Was the brass you're using shot in THAT rifle?

No, none of it.