Learn to use your firearm well first. Offerings to Ull and Skadi before the hunt, and to the spirits of the slain animals afterwards, are most appropriate. There is no life without death. The only surviving verse for this Rune is from the Anglo-Saxon Rune Poem, since Elhaz did not carry over into the Younger Futhark. This ties in, of course to the Rune's protective aspects.
Sedges grow in marshy places, and moose are particularly fond of grazing on plants that grow there.
Thorr and Audrey Sheil, my teachers, seldom agree with Edred Thorsson, who translated the version of the Rune Poems I usually use. On this Rune, they agree that this Rune represents not only protection, but also the connection between the Human and Divine realms. This latter aspect of Elhaz derived is from its meanings of regal things, honor, and grandeur. They mention that antlered beasties are traditionally seen as symbolic of fire and the sun. Elhaz creates a circle of protective white and blue light.