I read back through my posts. I did not see where I said 300 was the minimum. Maybe that's because I have never said or thought that. I have seen many elk killed clean with a 6 rem and .243. They were shot by very careful hunters. I've seen elk hunters that couldn't hit a barn from the inside with any rifle and have shot elk to pieces without recovering them. It's all about being proficient with your rifle.
My elk camp comment was taken wrong (you do have a habit of that) what I was trying to get at is we don't need another know it all because I'm there.