The best routine ive come up with for the first shot flier.

Night before i go hunting

I remove any oil from the bore with a 50/50 windex/rubbing alcohol patch. Most degreasers (brake cleaner) on a patch work also but be careful about getting them on your stock.

Pop 2-3 primers and run a dry patch once. It seems to even out the primer fouling but the bore is still dirty.

Double check that the flash hole is clear and load up at camp.

Ive also been using Montana Xtreme Bore Conditioner and it seems a bit more forgiving on POI variations vs some oils.Such as oils with PTFEs/Teflon really make it worse and should be removed.

Try to make a mental note of your first shot POI too with the load you want to use. If its only hitting a bit high, i dont make any adjustments.

BTW i would also bump up to 100gr-110gr.