those b-17s at the beginning were bots if you didn't know(smth happened to me like that before and i researched the entire P-51H-5-NA in that day because the bots are always 1-2 br levels below you like when i was in a 5.0 the bots were in 3.7s)
damn but trust me Munitions you have such a luck to research the Mk24 on 6.7 and not like me when it was on 7.0 i fought against 8.0 sometimes with a fricking spitfire xD it was funny but damn, still today i cant believe i was grinding with a Spit on 7.0 (Most time 7.3/7.7)