Tell me more about the Variflame kit. I do some rifle and pistol reloading so I have lots of small pistol primers. One thing I will say about them, tho, is that since they are so small they may be harder to handle, especially in cold weather, than those big old 209's. I like to remove my primer from my muzzle loader when I get into a vehicle, or around camp. And who knows what kind of situation you may find yourself in if you have to reload after a shot at an animal.
The reason most people think heavy bullets are needed for elk is in case you hit a shoulder bone instead of the ribs. And the thought is that the heavier bullet will penetrate further no matter what you hit. Elk are really big, and are not easy to kill. Even with a high powered rifle shooting broadside at the rib cage you may not get an exit wound, and can have a poor blood trail, if any, to follow.
Great range reports and other info, Double30.