"Also, in most scoring disciplines any grease ring touching the target is counted as in. Certainly for USPSA and IDPA it is."
I fully understand that. I started competitively shooting with guys who have sub 100 IDPA serial numbers in the early 90s.
Many tactical trainers take the exact opposite approach, particularly those with Spec Ops backgrounds.
At the expense of sounding snippy, If you had ever live trained, particularly in a tactically oriented class with a trainer, you would know that.