I want to work up a load for my .375 Classic Stainless with 270gr XLC's but don't know what COAL will work the best. I will undoubtedly start w/ .05" off the lands, but was wondering if anyone else has had any experiences with the .375 XLC's and could offer any pointers.

Using brass trimmed for uniformity, I suggest you seat the "X" bullets to as far forward in the cannelure as possible and crimp. The "X" bullets do well at the recommended .050+" off the lands and the cannelure is set accordingly, on average.