Feenix, 7977 will work well. I just traded a jug of it for primers & 200 gr MKs on this forum. It & H1000 were my go to powder for my 300WM until I tried RL-26. I am shooting a 1-10 twist Bartlein bbl. I find I can't get bugholes with anything under 190 grains. If things return to normal where RL-26 is easy to find consider trying it. I'm shooting bugholes with 190s & 200s at 3200+ fps by LabRadar. Gained +/- 200 fps with single digit ESs & SDs punching just 1 ragged hole at 300 yds. I only have 100, 200, & 300 at my house.
Feenix, my apologies. I thought you were the OP. Wishing you a great day!