Good deal on the blued barrel. I've been using them since to 50's with no problems.
A load around 100 gr of BH 209 will be good. Some like 110gr, but I feel 100gr will do the job.
I like Butch's Bore Shine to clean out BH 209. It has a strong smell, but that stuff doesn't bother me. It also cleans out copper fouling really well.
Anyway, have fun here. Lots of smart guys here. Welcome to the forum.