Dand, I got mine for working up loads for my hunting rifles and bigbore handguns. Helps keep you out of trouble if you don't have pressure testing equiptment. I honestly never used it for rimfires. Never cared about the velocity on them since I cannot change it. I just shoot the most accurate brand for the gun.
Or as I do now most of the time, I shoot federal bulk pack in everything. Over the years I've found it the best compromise between price, performance, & accuracy.
Regards,