i like the speer 165 grain grand slam with win 748 1 grain under max. works good out of my 700 xcr for deer over 100 yards. i likethat since its pretty close to my 168 grn bthp i use for target shooting most of the time. i dont have to change zero for deer. the differences ballistically tween the grand slam and bthp dont really show up till the bullet is waaaaay past any reasonable deer range.
i like keeping as few powder types on hand as i can get away with to minimize the amount of changing out powders when i load. there are better powders for a bolt gun than 748 and imr 4198 that you use is one of em. but it works well enough for my purposes.