XR-100 Barrel setback to 22BR?

[jebaczuk]

Am setting back the new factory 22-250 bbl to rechamber in 22BR. Want a no-turn chamber for necked-down 6BR Lapua brass. Plan to shoot 50 thru 67 gr. bullets. Is 14" twist ideal for this? Krieger or Lilja recommendations?

Is sending the bolt to Gre-Tan for his light-steel firing pin/hole bushing-job a good idea?

For ordering reamers/gauges from PTG for this 22BR as above:
--Any "gold standard" for reamer neck dia, throating/freebore?

Any other advice? I appreciate the help; just retired, been out of the game for 10+ years...lots has changed! It's sure fun catching up, tho. Thanks, guys.

 

[Preacher]

A .254 nk reamer will give a no turn, and the 14 twist will do you a good job with the 50-67 grain bullets.
Call Dave Kiff and he will set you up with what you want to do throat wise...
Gre-Tan's work is almost required on a 700 bolt, and it's money well spent...
I have more Lilja barrels than any other for whatever thats worth.....