I was at the range this evening and a cannon went off next to me.
The guy had his ammo box and I could clearly see that the shells were huge. I asked what caliber the gun was and he told me it was a 416 Win Mag.

Man every time the gun went off It shook me. I asked what he was planning on hunting with it and he said he just got it for Christmas and was going to go for Cape Buffalo in Africa hopefully this year. He asked if i wanted to shoot it and i said that i did.
I'm used to shooting my 270, 30-30 and 243. I did shoot a few rounds out of a 300 wby Mag once and i thought that was alot. Heck no it wasn't. The 300 wby mag felt like a 22 compared to this gun. This is not a range gun and this guy blew of f a whole box no problem.
What a powerful gun