Does anyone have any data for 2520 and 75 and 77 grain bullets in the 22br. I ve got 8 pound that Ive had for abt 20 yrs and now Ive got a 22br, and would like to set it up for a day at 600yds. Ive got some old stuff around and the Scott 4351 is a tad slow but seems to shoot well. Trying to work up as load on my day off and the winds are over 25mph #@%*&!