I fully understand, 500grains! I get a wave of nausea every time I look at a 600NE! I had a 577NE double that I got rid of simply because it was so unpleasent to shoot!
I wimp out at the door of the 500NE, in a 10.7 lb double. Anything bigger is useless to me. In the hunting field a 470NE isn't noticable, but on the range, even standing it isn't fun. I do all my practice with the heavies by stump shooting in the woods, much more like hunting. The range is for masacists, if big boomers are involved!