I am doing the 6 br with an 8 twist. I will br shooting 87 gr V Max's for the Pd's and 105 Bergers for antelope. I find the 6br a sweet round that stays cool, accurate and is hard to beat.
Thanks for all the advise.. I went with a 22BR in a Hart 26" 14 twist and .256 neck.. Mike Bryant is building it.. He built a 250 Savage for me 2 yrs ago that shoots bug holes with a 75 grhp. That's my wind gun..