Every body has to find the combination that suits there self and there gun. I do it a bit different, I spent a lot of time and effort finding cleaning fluid and metal preseveritive that would put the first shot in the group so I could start with a clean barrel if it happened to come down that way.
If you are going to hunt with a clean barrel then swabbing out good with #9 or a combo like I use would be a good idea as the first shot is usually the one that counts.
The only thing I see there that I might question is the sabot,it is my experance that the sabot is a make or break item as far as good groups are concerned, I suggest [especally for any long range possability] that you try several sabots the one that shoots best in the majority of TC guns with that bullet is the Short Black Harvester, but to be sure of the best combination I would also try MMP HPH24 the Short black MMP the MMP12 and the Crush Rib.
Good luck Lee