My son and I recently hunted in Zambia and our experience is the same as yours. Combined, we took zebra, kudu, water buck, bush buck, sable, sitatunga, warthog, and smaller antelope with a .280 Ackley shooting 140 gr. Accubonds. They worked perfectly. No bullet failures and no wounded animals running off. We use them on whitetails and desert mule deer in TX and have confidence in them.
Perhaps the earliest bullets had thinner walls, but the current bullets are good to go.
