lonewolf, if those 330-grain solid lead bullets are .44 or .45 caliber,(I assume they are, since they are sabot rounds), they should penetrate well enough for elk. The old Gould 330-grain (Lyman No. 457122) .45/70 bullet was considered very deadly on game up to and including grizzly bears. The one you are shooting should be as good, particularly if it is a Keith-style bullet!

Keep yore powder dry!!