Just tried mine yesterday Zero blow back

The plug and bolt adapter is all you need. It took me awhile to get those little 209's ta load smoothly. Got too used ta the large Red Plastic Jackets[&:]

I had some grease on my bolt for lube, but next time out will be with a dry bolt. Had to turn the gun on it's side and pound it to get them to fall out sometimes.

Also discovered that Goex Pinnacle Powder creates a Crud Ring (For the Very First Time Ever) at the breech, when using the Sealed Breech System[&:][:@]