Shot at 15 sheets of 3/4" industrial particle board today to test several bullets in my 338 also one bullet in my 300 rum. The 285 a-max was expanding by the 2nd board and we dug it out of the 10th board and it still weighed 267 gr and was three times it's original size. If it retains that much weight going through tough particle board it will punch through a lot. Others penciled through the 15 boards and nearly through a gong plate we had behind them. They were a solid brass bullet. I also shot some 210 gr .308 ALCO bullets and they penciled way past 10 boards. The ALCO's have been very accurate but finicky but I will not hunt with them. By finicky, I mean they have been very difficult to get any velocity out of before the pressure spikes to high and very hard to get consistent velocities. After penetration testing, I will shoot Accubonds, a-max's, ELD-X's and nothing else for long range accuracy and killing ability.