three 20 mm MG 151/20s and two 12.7 mm (.5 in) Breda-SAFAT machine guns are better for buffs hunting
If you love buff hunting with heavy weapons, try a Bf-110G2
2x 20mm MG 151/20 cannons, 350-400 rpg
2x 20mm MG 151/20 cannons, 200 rpg
2x 30mm MK 108 cannons, 120-135 rpg
(Also a favorite of mine is the A2A Rockets)
Really nice bomber hunter
Or a FW-190 A-8
2x 13mm MG 131, 475 rpg
2x 20mm MG 151/20 250 rpg
2x 30mm MK 108 55 rpg
Nice heavy package single engine fighter, quite nimble at high altitudes
Also: All P47s, Hurricane Mk IID w/ 40mm, and Bf-109G2 (Rather light IMO, but 3 20mms w/ gondolas)