No .320's but I've got some swaged 300gr. Horandy's loaded up for my 9.3x57, though.
: I got tired of waiting for a die from Lee that I'd have to modify, so made my own. It takes little more pressure on the press handle than normal FL sizing. It's all in the reduction ring inside the die - it's shape and finish.
; A .375 Throating reamer has the perfect angle for running up into a .222 RCBS FL die (top cut off) to produce a perfect swage. Mine reduce .375's to .367" in one pass and the bullets are perfectly straight. Had I cut it off a bit higher, they would have come out perfectly at .366". Since my rifle has a .370" groove diameter, I really don't care what size they are up to about .369" - they're still accurate.
: If like me, Woodleighs are about impossible to buy for you, swaging .375's is a good way to go. The 300gr. Interbonds swage just as easily. Trouble is, 300gr. is a bit heavy for the 57mm case - might get 2,000fps even - maybe.