A Moose hunter must have the proper caliber rifle and the proper bullet weight to bring down a Moose. Moose have been shot at 350 to 400 yards, but when shooting a moose at that distance, you have good chance of just wounding it. The energy required to bring down an Adult Moose is Minimum of 2100 foot pounds, preferably 2400 foot pounds. The knock down power will vary with the different bullet weights. The proper caliber should be a 30 cailber or larger, with the exception of a 270, which would have the poper knock down power of at least 2100 foot pounds at 150 yards using a 150 grain bullet. The knock down energy is required on impact to get the greatest penetration and make a clean quick humane kill. This also depends if you have hit the animal in the vital area (Heart, Liver, Lungs). On a adult Moose, the vital area is approximately 16 - 18 inches. Another factor is the mental and physical condition of the animal. I have shot Moose at a 100 yards, using a 30.30 Winchester Model 94. The knock down energy for a 30.30 at 100 yards using a 170 grain SP is approximately 1400 foot pounds. The Moose was browsing and not excited. He simply dropped on the spot with one shot. This does not happen very often, although many moose are shot with a 30.03. I have hunted Moose for 54 years. I hope this is some benifit to you.