Hello
one British test report with info on .303, .5 and 20mm, found by Kurfürst, can be seen here http://www.ww2aircraft.net/forum/aviation/best-armed-fighter-15964-14.html message #199.
IIRC the .5 B. Mk. II incendiary ammo is the older design, not US Mk. 8, which IIRC was a copy of Soviet 12,7mm AP/I.
Juha
one British test report with info on .303, .5 and 20mm, found by Kurfürst, can be seen here http://www.ww2aircraft.net/forum/aviation/best-armed-fighter-15964-14.html message #199.
IIRC the .5 B. Mk. II incendiary ammo is the older design, not US Mk. 8, which IIRC was a copy of Soviet 12,7mm AP/I.
Juha