Hello everyone. I really appreciate all of the feedback on my last question. I now have one more question regarding 22-250 reloading. I am currently building a custom 22-250 from scratch. My barrel should be arriving within just a few days. It's a McGowen fluted bull barrel with a 1 in 7 twist so that I can run heavier bullets through the pipe. I am planning on running some 90 grain matchkings through it, but I can only find loading data on bullets up to 80 grain. I am wondering if there is anyone that has a few ideas on powder charges to start with. I would greatly appreciate any and all advice and insight. Thank you for your time and consideration.