I think most guys whine about 3 guns on the LA-7 after they get shot down from what they perceive is as to far for the Russian cannon. We'll call it 400 to 800 k out. I have found from flying the LAs that this usually happens when a con is in run mode, usually a runStang or FW-run90, and is flying flat. Almost like he's got auto-pilot on.
The truth is this is the worst thing you can do against nose mounted cannon. A LA, P-38, and especially a Mossie, will kill you from way out if you fly in such a manner and yet I see guys, even experienced guys, do it all the time when an LA-7 is on their tail because they 'think" they are out of range of the "made in Russia" cannon, even tho they wouldn't think of doing it against Hispanos. Or even a Niki.