In actual combat at the expense of the Germans, this was found to be true.
By the time they were fighting Germans, the 200 grain lead bullet had been replaced by a lighter FMJ bullet, due to the Hague convention of 1907. Weight was about 178 grains. Don't know about the affect of dwell time, but the 178 FMJ had a miserable record. The 200 grain lead, which was also offered in the US, was considered a pretty good stopper at the time.