Hi Jack!I would suggest a couple of changes to improve the effectiveness of this exercise.
1. You need to be covered while moving. If alone, fire rounds in the direction of the target during movement. Just getting rounds in the direction of the enemy will usually keep their heads down.
2. Add a combat roll when reaching cover. Come to a stop in the kneeling position and so that you smoothly and quickly transition from combat roll to a kneeling firing position and immediatly begin putting rounds on target.
3. Go to a kneeling position anfter the last salvo is fired. This will allow you to initiate a second combat roll to get off the X should another threat be spotted followed by fire from the prone unsupported firing position.