I had awesome luck with my Sako 85 Grey Wolf in 22-250 with those Speer 52gr HP's using IMR3031 powder from my 22" barrel I was getting 3700fps all targets @ 100 yards where 1 shot holes and 200 yards was consistently 3/4" - 1 1/4" groups but over the last few months groups these loads have opened up to over 2" - 2 1/2" @ 200 yards.
My favorite accuracy load so far has for years been 36grs IMR4064 any LR primer/brass/55gr bullet isn't the fastest load 3600fps from the 22" barrel and 3660fps from my old 26" barreled Ruger Tang safety but it is so accurate.
I was at the club yesterday with the Sako and the results again where terrible with the 52's but the 55gr IMR4064 loads were true to form.
Thanks for sharing your load I'm going to keep my eyes open for some Tac would like to modernize my loads and gain another 100fps if possible...
About hunting coyotes when I head over to the in-laws in Alberta or into Northern BC where the shots can be long I am now starting to take my old 22" barreled Voere long action (made in Germany) rifle that was a 243 until I rechambered it to 6mm-284 loaded with 70gr Ballistic Tips @ 3600fps.
The difference in killing performance between the 223 and the 22-250 is basically the difference between the 22-250 compared to the 6mm-284 it drops them so much harder a longer distance it is awesome to see.