Thread: 22-250 Ackley Improved Load info

Originally Posted by grandpamac

Greetings again Curtis27,
Nosler has data for the 22-250 AI in its online data but the only ADI powder listed is Varget (AR2208). They also list net case capacities for each projectile. The increase in case capacity is about 10% which should allow a 2.5% increase in velocity, roughly the difference in their loads. If your rifle had a new barrel it may have a faster twist than the standard 1 in 14. Worth measuring as this may allow a wider choice of projectile weights.
Grandpamac.

Thank you very much for that @grandpamac. So with that calculation, I run 35.5gr Benchmark 2 in my standard 22-250, the Ackley improved being 10% more case capacity, divided by 4, giving 2.5%, would I increase the powder charge by 2.5% to hope for roughly the same speed as my standard 22-250?
I know every rifle is different and I will work my way up to that but is that the idea?