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[mikebin]

Even though they are close together on the burn rate chart I would also think that you would want to consider/compare the type, shape and density of  H380 in relation to LVR before you start load work up.  For example the density of H380 may not work in the ARC case.  All things being equal between the two of them except H380 being slower than LVR it would be worth investigating a load work up if I had it on hand.

Not having any experience with H380 that’s my .02, hope it helps in some way.

Good points, Trashy.  I don't have any Lever to compare it to, but I'll see if natoreloading.com has good picture of it that I can use.  Or, if you can post a pic of a small pile of Lever I can use that at least as a visual comparison.