Yes, the 37MM on field guns can go out far. But not on the Yak-T. They disappear like any other airplane guns at around 1.5K.
The field guns are their own modelling. Just because it shares a caliber doesn't make them the same gun, so the Yak has a totally different round.
Although I think it goes out further than the 20mm/30mm rounds. Due to their nature, some rounds have a longer "lifespan" or duration in which they fly forward. I think this includes all rounds of 37mm or higher caliber. The distance the round can fly will also change depending on the air density. Firing on the deck makes it slow down all that much faster. Firing at 15k or even 20k makes it go a lot longer. Aiming is still a problem, but I sat behind some higher-alt B-17Gs in a Yak9T once and plinked them from over 1.5K (closer to 2.0, but not quite there). I pinged the lead about 4 times, but due to dispersion and distance and guess work none landed in the same place. I never got a critical hit. Now, I was smart enough to know this was due to the high alt. I could never have done it lower down. The guy I was shooting wasn't smart enough to know if I can hit HIM, then HE could hit ME... so he never fired back lol.
