I would consider 300 to 400mts on most game to be long range, well for me. I do understand that in some places and some game 300 might be as close as you can get to game. On dangerous game anything over 75yd I would consider long range.

I dont have any problems with 300mt shots on game other than DG but 500 mts is too far for large game. Fire the shot and animal can move enough for a wounded animal to result. Just my thoughts.