system
Given the following post, respond as if you're commenting on Reddit:
human
[Overwatch] How did Gabriel Reyes reload before he became Reaper?

So we can excuse Reaper's magic shotguns with nanomachines bullshittery, but I highly doubt the same was the case with Overwatch Reyes. So what practicality was there to dual-wielding shotguns that only held 4 rounds each?
gpt
I suspect Reyes didn't use dual shotguns while in Blackwatch, but in his current form the weapons represent his violent, brutal way of fighting. 

The nature of BW also could have meant Reyes didn't need to starting firing often.