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? smile