The big impressive 1909 Colt New Service and its specific ammunition, a .45 "long" Colt with enlarged rim for simultaneous ejection, was no more powerful. Loads were in the 700 - 750 fps range using Bullseye or RSQ smokeless.
The other face of the new overloaded ammo in old guns coin is that it would not be smart to pound your mild steel WW I 1911 with fresh Ranger T +P, either.
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