Another vote for an MOA precision adaptor and Nordic MXT system. I run the +8 99% of the time and run my +5 every now and again if the match requires it (Like blueridge)
I ran ~2000 rounds of Federal top gun 2 3/4dram 1oz last season with only a few malfunctions. I switch between this and the 3dram version, there is a slight difference but I run them interchangeably. For slugs I run Federal Low recoil.
I started with dual loading for a week or two to get used to the motion of putting the rounds in the gun before having to juggle the extra two shells. I think this is the easiest way and I got to reliable quads in just a few weeks this way.