I will vote for the 7 X 57 as a great choice for PG. With TSX's, Partitions, or the equivalent, it will take care of business. It is pleasant to shoot and does not beat you up to practice with. More practice will make you more confident. Shooting 40 rounds of 7 x 57 at the range is no sweat. 40 rounds of .375 H & H is more taxing, to be kind.

"The Democrat Party looks like Titanic survivors. Partying and celebrating one moment, and huddled in lifeboats freezing the next". Hatari 2017

"Hokey religions and ancient weapons are no match for a good blaster at your side, kid." Han Solo