I used Bohler Fox BVD rods last summer (in Northern Alberta, Canada) on 16" and 24" Steam and Oil Pipeline project, is that the rod you are referring to? 550 grade pipe with 8010P1 Root and Hotpass, Bohler Fill and Cap. They are a Lo-Hi (100 or 11018?) downhand rod. A little strange getting used to them as I had never run a downhand 18 rod before. Nobody else on the crew had much experience with them either. The wire is sharpened like a pencil tip with a bit of gunpowder on them so they flashup very quick- no waiting around for the rod to get hot. You would think those rods would be good right out of a fresh can but we found that they were best right out of a very hot oven. Sometimes they would get the odd bit of fine surface porosity on starts. Tough to stack much of a fill with them on straight verticals and you really need someone on your heat to crank it up down the sides and colder top and bottom.
We were stuck using those rods because of an existing weld procedure and time constraints. This next phase that we are on the procedure has been updated to use Lincoln G80M wire for fill and cap. Much faster but we now have a huge hassle dealing with weather (using HexHut tents) and lugging those damn suitcases around ;)
While they are certainly interesting rods they are very expensive and hard to get here.