Sounds like fun.

I shot an " NRA Modern Military" League this Summer, primarily to improve my Offhand precision. While I found it to be mindlessly boring and SLOW paced, it DID help with 100 yd. accuracy Offhand.
I'd always been a "if you can get steady, get steadier" shooter with any distance/precision requirements. That and endless "Run and Gun" Stages/Drills had handicapped me with the Offhand shooting.