There are several suppliers of good cast lead bullets in .360" to .361". Primary choices are 145 gr or 200 but there are some in between. I load 160's in my .38 S&W's over 3.5 gr of Unique.
My mold is an old Lyman RNFP that drops at .361".
Here is my Favorite 38 S&W.
Not the prettiest but light, easy to carry and accurate.