It's always interesting to read these types of threads where someone wants to know about those chicago, fbi, treasury, keith, buffalo bore loads that skeeter worked on.

Myself, I like to pick 1 load. Here's what a fbi armorer has to say about the "fbi" load.

The FBI 158-grain lead HP +P .38 Special load is still available under the Remington symbol R38S12 or Winchester X38SPD. The equivalent Federal 38G has been discontinued. Alloy was 2% antimonial lead, which when fully cold worked and recrystallized is about 8 BHN. A cast HP of shape similar to #358429 with cavity 0.6 of the meplat diameter, with 15 degree included angle draft on the core pin, cast of 1:40 tin/lead has very similar upset characteristics but is a bit heavier at 162-164 grs. Velocity of the X38SPD with which I am most familiar was 855+/- 30 fps from the 4" SAAMI "vented" test barrel, which simulates revolver ballistics with a 0.008" cylinder gap.

This velocity is approximated with 158-162-grain cast LHPs using canister powders with either 4.2 grains of Bullseye, 4.8 grs. of W231, 5.2 grs. of Unique or 5.5 grs. of PB, at a minimum cartridge OAL of1.50". All are +P loads!