What I have learned is that, you may want to bring your rifle out of your shoulder and into your chest more.
Granted this is better when wearing plates, But if you bend at the waste, like a fighting stance, keep your elbows in, face the threat, and keep the weapon centered. You may find a difference.
I can dump a mag on auto with this and get within a 12 inch group, and I can get sub MOA on repetition.
It also allows you to gain the muscle memory needed for good tranistion drills.
This is what I have been taught... From our big boys here in Canada. It's all adopted from the Blackwater training levels...
Not saying it is the best.... But it is what works for me. It is always harder to do these drills with a full length rifle, vs a carbine, or sub machine gun, however the principals are the same.
Keep everything centered, tucked and tight.