Have a limited supply of 6mm Rem cases, so did some research on necking down 7x57cases. Did 20 Norma cases first, took the neck down with a 6.5x55 die with the spindle removed. Then again with the 6mm Rem with the spindle removed. Trimmed to length and resized agin with the 6mm Rem dies with the spindle replaced. Came out real nice, and chamber freely, so all good.
Also had 40 S&B cases so used the same process to resize them to 6mm Rem. But they wont chamber freely like the Norma cases, so had a look with the callipers - the Norma are .273 OD at the neck, the S&B are .278 OD and its that little bit of extra on the neck thats causing them to not chamber freely, and will be even more so with a projectile seated.
Whats the easiest way to neck turn these cases that aint gonna cost me a fortune? This is likely to be a once only thing, never had to neck turn a case in over 40 years of reloading. And now that I've got a nice supply of cases for the 6mm Rem, I dont see me ever needing to neck turn cases again.
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