You'll get even better accuracy with 147gr ammunition. I've found that none of the 39xx guns seem to like 115gr ammunition. At least none of mine, although the 6906 seems better with it than the single stack compacts.

My theory, which some people seem to think has some merit, is that when these guns were designed in the late 1980s, 147gr ammunition was the standard for LE agencies.

As a result, these guns work best with heavier bullet weights.

124gr is certainly acceptable. In fact, NYPD specified 124gr ammunition for the issued 3914DAO pistols. I work on the assumption that any other 9mm S&W pistols also used it.

115gr always seems to shoot low in my 39xx guns. As in 3-4 inches low.

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