Oh bollocks - the scope takes Vision Enhancements, just as a pair of Contacts would, but due to not figuring how to add it to the scope in Chummer I forgot - can I retroactively add the Image Magnification I forgot to put on his two scopes (he does have the money left over)?
I was applying -4 for the weather anyway; no thermal (now there's a good thing to add to the scopes...) and I didn't think to look at how Low-Light vision adds, so d'oh.
His second shot was a Short Burst, so that only has a recoil of -3, so no recoil penalty at all. I can't see where it says recoil stacks past the second burst, but even if it does, he's still only on -5 for his posted second round of short bursts - so that'd be one extra dice I shouldn't have rolled, just knock off a hit.
Finally, I never said he was going to change target; he will happily shoot the other man again, just to make sure.
So, insofar as I can see, if you let me add the VM that's meant to be on the scopes, I should have two more dice for everything I rolled; if you have it stand as only having it until I add them it's the correct number of dice rolled (it's the same as I'd have got for an ordinary aim action anyway); and if the recoil keeps adding up, then I'm a dice over for the 4th shot posted (and I'd just deduct a hit).
Do I still need to reroll? Because as far as I can see, the dice pools are right as stands.