These are good dies, maybe not the "best" die set you can spend your money on, but for the number of 270 rounds that I will load, they will be passed down to my son in perfect working order I am certain. It turns out the chamber in my 270 was tight, so rounds were somewhat difficult to chamber. Lee asked me to send in the sizing die with two spent cases fired from my 270. They custom machined my die to fit my chamber and sent back the die and spent cases. And Lee didn't charge a penny for it, not even for the return postage. I am happy with the die set, and I am extremely happy with Lee's customer service.