This depends on the plane as well Spitlead. In the Jug I use 300 for all guns. In the Hellcat I use 250. Because the kitty has 2 less .50 cal MG's, I need to hit closer for my hits to pay off. The ballistics of the guns make a big difference as well. The lower velocity cannon rounds tend to drop off faster, so they normally require a closer convergence setting to be effective.
The Hispano's and .50's are the ones with the best long range shooting ability. With those guns, you can run out to 300 or more if you wish. Personally, I find anything over 300 bad for .50's, because although I hit at longer ranges I don't do enough damage.
The main thing is to try some different settings and figure out what works best for you in the planes you fly.
Oh, and the range is measured in meters or yards. Same length, so pick your favourite.
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Sean "Lephturn" Conrad - Aces High Chief Trainer
A proud member of the mighty Flying Pigs
http://www.flyingpigs.com Check out
Lephturn's Aerodrome for AH articles and training info!
[This message has been edited by Lephturn (edited 05-18-2001).]