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Forming 17 Fireball to 20 VT

What are the steps to convert 17 Fireball to 20 VT? Brass looks close, will a pass thru a FL 20 VT
sizing die get the job done, or more complicated? Appreciate any help.
 
I prefer to use 17FB and neck it up because the shoulder is the right angle.
I have done one pass through the 20VT die successfully but it takes a strong effort. My gunsmith built me a neck expander that sizes the inside of the neck to .198 then it goes through the die real easy.
 
I assume that no neck turning is required with Nosler brass? Are you annealing the cases before sizing? Any split necks? Thanks
 
I used new Remington brass some years ago when it was readily available. I did 1000 and don't remember any significant neck splitting issues. I have not annealed. I shoot a lot of various cartridges in 17-24 caliber. I like the 20's best and love my vartargs.
 
I highly suggest lube on the inside of the neck for less frustration. I used a mandrel when I did some.
 
I use Nosler 17FB brass for my 20VT. I ran thru my 20VT Full Length Die to expand to 20cal and then had to turn necks still to get 228 loaded rounds.
 

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