Big Rx sent me a PM and I replied. I will post some info here on the Hawk bullets.
I first used .408 diameter 300 gr with the .025jkt in my 450/400 3 1/4" double rifle. I wanted to shoot deer and pigs with a bullet that would expand on behind the shoulder shots. After talking with the Hawk people we decided that the .025jkt would be the right one.
My velocity was @2330fps. They worked PEREFECTLY.
Most of the pig kills were one shot/drop. Those that did run never went over 25 yards. I recovered a few bullets and they were mushroomed to a large diameter with little or no shank left. They are perfect for broadside shots.
I liked them so well I got some 9,3 285 gr with the .035 jacket. I used these in my 9,3x74R double rifle, velocity again around 2330 fps. They too have worked perfectly on several deer, impala in africa, and several wild pigs. The bullets I have recovered from pigs have expanded almost as big as the .408's but still have quite a bit of shank left.
They are not bonded.
I now have some 400 grain .408 with the .035jkt that I will test on pigs and if the results are good use them on black bear over bait.
You can gert Hawk bullets in almost any diameter. Also you can chose the jacket thickness for the velocity you are using. There are plenty of good high velocity bullets around, but I think the Hawks are some of the best around for low to medium velocity rifles.
For velocities above 2400fps or for bigger game I would go to a thicker jacket. Give them a call and they will help you decide which jacket thickness is best for you intended rifle and game. After all they should know there product best.
The Hawk bullets have worked great for me.