I figured I'd give some comparison to Sarge's shooting for those who don't know what good shooting looks like (cuz Sarge's targets have good groupings):
As you can see he shoots much better better groupings than me and I'd say I shoot about average for a beginner.
18 rounds (17 in mag 1 in chamber) were shot at 20yrds from standing position from my S&W M&P .40 with new Storm Lake .40 to 9mm conversion barrel and Cheapo Monarch Steel 9mm 115gr. ammo. This is the first time I have shot 20yrds and it has brought some interesting issues to light about my shooting stance and pose. The issues are with my support hand and you can see the groupings develop closer and closer to the middle as I adjust. All rounds inside groupings were fired within 5-10 seconds of each other as I took a few seconds to reacquire the target.
I shoot best lefty and my support(right) arm tends to bow at the elbow as I go through rounds, even though I'm trying to hold both arms straight.
The 1st grouping (marked 1st) is when I didn't realize my support arm was bent at the elbow. It's not super noticeable at 7yrds, which is what I usually shoot so I havn't really payed much attention to it. At 20yrds it throws shots way off target as seen in the 1st group.
The 2nd grouping I took time to correct my elbow and pull it straight before I started firing and I paid a lot of mind to my support hand as I was engaging. However, this obviously threw off my vertical aim as I was intent on containing my horizontal axis.
The 3rd grouping was of my last 8 rounds and you can see I was compensating for the 2nd grouping by focusing on my vertical axis, but as you can see my elbow started to bend and the shots strayed further and further from the middle.
Hopefully this will spread some light on Sarge's grouping for those who think it's easy... it's NOT.