Well, that's promising. Let's try staying on the north side for CT7 and focusing fire. James should get 2 passes of laying down fire. Assuming James could grab the extra clip for the Alpha with 1 Simple Action, and will need to spend another Simple Action to grab the clip of grenades.
CT7 IP1
Free: Full Defense
Complex: FA Burst at sub
I have: AGI (11) + Firearms Group (

- Called Shot (4) - Firing in Melee (3) = 12 dice.
Shoot Sub:
12d6t5 5Hitting 5 Accuracy. Damage is 12P -3AP, staged to 17P -3AP
Oddly, by RAW James is better off switching the Alpha to single shot and letting loose with 1 bullet at a time as the sub can't Dodge and damage isn't increased by extra rounds, but that's silly, so I'll leave how damage is modified up to the GM. I neglected to take Recoil into account. Hmm, let's not do anymore Complex Bursts from here on out.
James is at 8/42 Alpha, 1/5 Redline 1/5 Edge
CT7 IP2
Simple: FA Burst at sub.
Free: Drop mag
Simple: Reload Mag
I have: AGI (11) + Firearms Group (

- Called Shot (4) - Firing in Melee (3) = 12 dice
Shoot Sub:
12d6t5 2Damned Spirit is harrying him pretty bad this pass it looks like.
Damage in this case is staged to 14P -3AP.
James is at 42/42 Alpha, 1/5 Redline, 1/5 Edge.
Initiative:
Initiative:
16+4d6 31So 3 passed for CT8 with going full Defense.
CT8 IP1
Free: Full Defense
Simple: Grab extra clip of grenades
Simple: FA Burst at sub.
I have: AGI (11) + Firearms Group (

- Called Shot (4) - Firing in Melee (3) = 12 dice
Shoot Sub:
12d6t5 4Damage is staged to 16P -2AP
CT8 IP2
Simple: Take Aim (extra die)
Simple:: FA Burst
I have: AGI (11) + Firearms Group (

- Called Shot (4) - Firing in Melee (3) + Take Aim (1) = 13 dice
Shoot Sub:
13d6t5 0By Ghost, he nearly missed the broad side of a barn. Hopefully Illeana wasn't watching through her Spirit's eyes on that particular burst.
Base damage is 12P -3AP.
James is at 30/42 Alpha, 1/5 Redline 1/5 Edge.
I'll see where this gets us before I declare for the last pass. James will shoot another burst if there isn't much of a hole, or consider switching to grenades if there is a fist-sized or better hole. Would I be looking at the regular -4 Called Shot for putting a grenade in the newly-fashioned hatch?