oldwun
This discusion might help one question.... I do not think you can season a modern steel barrel - I do think you can condition one.
http://www.huntingnet.com/forum/tm.aspx?m=1884685
You will get answers both ways and it will be anindividual decision for you ...
In my Omega I am shooting a 100 grains of T7-2f loose powder and a 250/60 grain bullet in a MMP HPH-24 sabot for whitetail. You will learn your barrel is probably a tight barrel and often you can not use Hornady packaged bullets and sabots....
Are you just getting started with aML? if you are Cayugad can provide you with all the iniatial information... he is a much better spokesman/writer than I...
Have Fun