Sounds plenty safe. Maybe on the low side, but I'm not loading for your gun.
2004 Allliant 8 1/2 X 11" manual shows 3.2 grs. with the 71gr. FMJ at 13,5000.
Herco is the powder of choice for me in .32ACP, .32 long, .380, and 9mm because it provides performance.
For my Walther pp series and Mauser HsCs I load the 71 gr. FMJ with 3.4 gr. and the 100gr. .310 dia. JSP - .32-20 bullet with 3.2gr.
Good accurate loads for me.
Full case of powder and absolutely no signs of problems to the cases or the guns.
JT