I was looking at the Magtech First Defense rounds (first time I have heard of them) and they sure look like a twin sister of the Corbon DPX. I believe the bullet weight is less but they are 100% solid copper.
"Trust the bullet that delivers deep penetration and devastating expansion..." Sure sounds like the same comments made by Corbon about the DPX. I understand these are somewhat more cost effective than the Corbon DPX.
Any comments regarding the above would be appreciated.