Quote:
Originally Posted by carlosmojoli
how many lands and grooves have a .38 spec S&W revolver?
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Five. That's what makes them hard to measure.
The only S&W revolvers I know of with a different number on lands and grooves were the .45 ACPs made before the mid-1990s. They had G.I. Joe 1911 rifling as specified in the government contract for 1917s.
S&W’s standard 18 ¾” twisted .38 specials shoot 110 through 200 grain bullets just fine so there wasn’t any need to change the twist unless the British demanded it. Besides, the Victories’ sights would have been regulated for the 178 grain FMJ load the British adapted in 1937.