I wouldnt consider 4 Yank 0.50s as "poor". Or 3 + one Finnish one, whatever.
"Adequate" is a far better term. When I get some brewster time in Im going to set them to 300 convergance. 4 0.50s, on such a stable platform, will take down anything that flies. History records those 4 0.50s as really putting a thump into the Soviet Air Force. A military aircraft industry not exactly known for making paper machet air planes.