Wanted to reply yesterday but I couldn’t access the source I needed.
No I got it.
What I wanted to say is that the Breda wasn’t as bad as people think.
In WT we have the Ho-103 which works the same but fires at 900 RPM instead of 700 RPM.
Likewise the US .50cal fires at 750 RPM but firing heavier bullets at higher velocity.
However there are two issue with the US AN/M2 .50cal and the Japanese copies, which is that they fire from a closed bolt.
Additionally they have pretty light barrels.
What isn’t represented in WT is that US .50cal heats up quickly but cools down very slowly.
A maximum of 150 rounds can be fired in a single burst, without the danger of cook-offs.
If an innitial burst of 75 rounds is fired and the guns is cooled for one minute after each burst, 400 additional rounds can be fired when limiting the burst size to 10 but only 150 can be fired when the burst size is 15.
So firing 475 rounds would take 40 minutes and firing just 225 takes 10 minutes.
With a cooling interval of 30s only 165 bullets can be fired in 15 round bursts, which takes 5 minutes.
Next is the accuracy. While the gun is probably fairly accurate in short bursts, a 100 round burst puts bullets 75% of bullets in a 4 mil radius.
Officially the effective range of the gun was just 400yd, as at longer range the efficency would drop significantly, as you would need to fire a lot of rounds to make the same hits required for a kill, but this would also overheat the guns more quickly.
The same would apply to the Japanese Ho-103 and the Type 3, which are copies of the US gun
Meanwhile the 12.7mm Breda-SAFAT uses a shorter but heavier barrel than the US .50cal and firing from an open bolt, which allows the barrel to cool much more efficently.
This would make the 12.7mm Breda-SAFAT more accurate, require a longer time to overheat and also cool down much more quickly and give it an advantage in range and in the ability to keep up pressure, firing longer bursts with less risk of a mulfunction.
Now there’s no denying that two synchronized 12.7mm Breda-SAFATs are very lacking in terms of firepower within the effective range of six US .50cals or even a single engine mounted 20mm.
But it would have a distinct advantage over similiar short recoil operated 12.7mm MGs, like going through 350-400 rounds, while others might stop working after firing just 180-200.