The blockade run victory for the Space Marines was a surprise to both commanders. Having decided to aggressively engage the Chaos forces rather than leg it as fast as they could, a devastating first volley almost totally destroyed one cruiser while the other was then lightly damaged by ordnance.
Putting all power to the engines, the Imperials legged it past the Chaos ships and left the sector as soon as they could having caused only minimal damage. Had the inexperienced Chaos commander manoeuvred slightly better, or been able to roll a ruddy 7 or less on two dice in three attempts for reloading ordnance, it would likely have been a Chaos victory.
Instead the Marines escaped with one damaged cruiser and one lump of space debris with an engine and basic life support. Rumour suggests it was later borrowed by a mob of rebel grots and driven haphazardly around the sector until eventually being crashed into the satellite moon of Phyrr known as Canal-Near-Tescos XIII. It may since have been recovered and repaired.