In my daughters case she was shooting a .243 with 100 grain bullets and we had spent many, many hours at the range shooting targets out to 300 yds. I put a 6x burris scope on her rifle so there was no guess work in dialing the scope up or down to a certain power. In addition her rifle is outfitted with a bipod so she can always have a solid rest
The shot was taken while the wind was calm, the light conditions were perfect, she had a solid rest, knew the range, was confident in her ability and she took her time. She passed on other shots during the season because she wasn't comfortable.
This is the KEY!! The girl had practiced at this range, KNEW the distance, good conditions and was calm about it. The gun is WAY more capable than the hunter is almost all cases, as long as the hunter stays within their limits, go for it.
Personally around here, you can rarely see 100 yards, but we don't have open areas like in those pictures. 50-75 yards is a LONG shot in the woods of NH. Heck most rifle ranges around here don't go much past 100-150 yards.
--Bob