Coupla more options for you...
.250 Savage: Lyman 257464-H.P., 91 gn., 6.5-8.2 gn. Winchester Super-lite powder, WLR primer. good precision @ 50yds., consistently under 1" grps.
.308: Lyman 311467-H.P., 4gn. WC-846, CCI-200, Mv(ave)=1435 fps, .482" grp @ 50 yds from an out-of-the-box Rem 700.
.375 H&H : Lyman 375449, either 26-28gn. Blue Dot OR..45-47 gn. WC-846, WLRM primer, Mv(ave)=1800 fps, consistently <1" @ 50 yds.
.458 Win mag: 500 gn. NEI, 50 gn. IMR 4895, WLRM primer. Mv(ave)=1380 fps from my 21 " bbl. Shoots "cloverleafs" from 50 yds.
.41 mag: 6.7 gn. Unique, CCI-300, 225gn. commercial cast...This is a VERY mild load which exhibits excellent precision from all of my .41's.