Builder45, I can't tell you about "A-Squares ammo" but did have problems with them a few years ago, not delievering the goods I paid for and then billing my credit card. Ummmmmm so did other people get left high and dry.
Any premium bullet you choose will do nicely on those plains game animals, more bullet weight the deeper penetration, especially on animals like eland, kudu and wildebeast.
Good Luck!