Did you ever check the velocity for your H380 load. I played with some years ago and found it too slow for the 308 with 150 and 165 grain bullets.
I've done a lot of 308 handloading since then and I'm pretty sure you'll be happier with Varget, RL15, IMR4895, H4895, W748, N140, IMR4064 or IMR4320 with typical bullet weights. Catch the drift?