Bucket,
That 6500 hasn't been relined in a probably 3 years. I think it is Big Game 15 lb test and the shock leader is 50lb test of whatever I have in the tackle box...lol, I really don't remember. Nothing special I can assure you.
I am planning a seminar in Berryville
Va in Sept.
438' with a 7000 abu and 20 lb test line is darn good cast. Using a 6500 and dropping to 15' test would add some distance. How much is hard to say but 50' is not out of the question. That puts you very close to the magic 500' 8oz wall...
I would recommend 50 lb test with 8oz.
Keep hitting it
Tommy