I have a Defiant Tactical long action and a Bighorn TL3 short action.
The TL3 action is very good. Three things that are cool: mechanical ejector, you control the bolt, slow or fast pull, - the brass ejects from the port and you pick it up or the brass flies over 3 feet away.
The floating bolt head: to ensure that the lugs are 100% contact.
There is one tiny hole on each side of the action, in case the hot load (brass) blew up and the gas will escape through the tiny hole instead of your face.