I've never used the 13.5 gr 2400 load in 38 spcl cases. If I want mag performance I use mag cases.

From what I've read 2400 has changed since Keiths and Skeltons day. It was reformulated several years back and now burns a bit FASTER. The old 13.5 load may now be 13.0 grains???

Just a thought.

FN in MT