Get a cheap reading comprehension plugin.
Sorry, got a bit angry. Just associated where you were going. And nope, you are not able to get kills from 800 out even with those big-step-forward MGs. Even the best set up snapshot makes minor damage unless you can hit the opponents pilot, summa summarum you have to get in his six and stay there to finish your opponent, whos able to do two things: outturn you OR dive away. There are no planes in the planeset what cant do either (ok the p40B, but how many p40b-s have you seen this year?). In the F youre at least able to turn with the spits for a while, being about average 5mph slower, still being outran by the spit8 and still being able to catch the spit9.
