Get a plastic sheet on the ground and put some fairy liquid on it, dive on to that, like when you were a kid. Don't hold your gun at first just run and dive onto the sheet, the more confident you get, bring the gun into it later on, then add the hopper! Kids have been diving like this in the summer and don't give it a second thought. The faster you run the easier it is as long as you keep the barrel up!!! punch forward as you dive down and slide onto your fore arms and elbows, that way, when the gun is in your hand, you'll not take core samples with the barrel!
Keep it simple!! Run fast and get low into the dive!