Just my opinions...others may vary.
Firelapping is over-rated. Use as a last resort. I have found my barrels attain max accuracy in a reasonable number of shots...try firing a pack of conicals or powerbelts through at the beginning. I had a Traditions that took over 100 shots to tighten up, but my Omega took only about 20-30.
I think "seasoning" is also over-rated...especially with fat products like bore butter. All this has done is rust barrels for me and make it hard to get sabots down. Maybe it is good for traditional guns, but I think it is a bad idea for inlines.
Stainless or blued, I've never noticed a difference. But I haven't been through all that many guns either.