6mm 284
I wildcat several cartridges off the .284 original case.
By far Laupa Brass is the best.
For the 6mm X .284 I recomend getting a full length sizing die from Redding. I use a Redding Competition seater die.
If you use a Redding S type bushing die on the first sizing you may get a donut ring.
For sizing up I recoment a tappered expander button.
I load and shoot 6mm .284, 6.5 X .284, .284, and 30 X .284 all are great cartridges.
Nat Lambeth