22-250
What is the rifling twist of your barrel? If it's a factory 1-12 or 1-14 save your time and money as it won't stabilize bullets over 60-70 gns. If however you have a custom twisted barrel of 1-8 to 1-10 I'll shut-up and let the 22-250 guys take over and give you some loads. I use nothing but 52-53 match bullets in 22-250.
Douglas