I'll have to look up the loading data to be sure, but I think I was using BLC-2 and 80 gr. Sierra SSP or the 85 gr. Nosler bullet. Kimber used 1-9 twist barrels on their rifles.

What kind of extraction problems are you having with your 84? Is the extractor worn or damaged? I hope not, as they're all but impossible to find. There were a couple on eBay a couple months back, but I stopped bidding on them when they hit ~$70 for the pair.

John in Oregon