Don’t want to waist film. I was hoping to get an advice from people who has experience shooting old TriX.
I shoot old Tri-X, and rate it at 200 most of the time but, 400, 800, 1600 are no issues, but first check, The Massive Film Development Chart.
In most cases, I over expose film by a stop, so there's some quirks involved, but generally, its good if stored cool, cold, frozen.
Warm rooms films need more attention
Load your roll, expose it for three shots at 200, 400, 800,1600.
I use to use HC-110, dilution H, when the old stuff was available, but that's the past and I've not tried the 'new' stuff.
D-76 is my go to developer for me at films now, but pyro is a sometimes choice, for non Tri-X films.
I have encountered some too old/badly stored Tri-X and have had rotten results, and have had Kodak product failures, bad reticulation of two rolls in a five roll tank, with three perfect results but that's a once in a decade sor of result, so don't worry about it.
Good luck.