With repsect ot the trigger question, why dont you email Remy with the rifle serial No: and ask them when it was made? They will tell you if it has the new trigger or not.
Just Cos you think it looked new and now find it is possibly older than you first thought doesn't mean its been fired. A guy recently was selling a boom stick here that was years old and NEVER had a shot fired through it.
I would still run that barrel in as Roy is advising.
A rifle like that would cost $2000+ here new and at least $1400 SH so go figure.... you got a bargain.;)
Vegetarian is an old Indian word for lousy hunter!