If you have a safe place to do this. I used a 44 Mag for this but a 454 will only make it better. Supplies; One 2 liter pop bottle full of something bright colored (I used Red-Pop) and a 5 gallon bucket with lid, water. On the safe range, fill the five gallon bucket to the very top with water, lightly place the lid on the bucket and set the 2 liter bottle upright on top of lid. Shoot the bucket with you full powered ammo and it will launch the 2 liter bottle 50 plus feet in the air, shoot the bottle when safe to do so (if you can!). Ivan
H Richard when you don't have 500 yards to practice, use M&M's out to 200 yards. If you can nail M&M's at 200 you can nail anything in the dog town at 500! Remember; "Aim small, miss small" (from American Sniper & other places.) We like to shoot Cheeze-it crackers (about 1 inch square) with 22 LR on windy days, then hunt down the pieces and then the crumbs. Good wind training. Ivan