I have used a lot of Starline brass in many pistol calibers, 308, .270 and 45-70 Gov
My experience with 45-70 gov has been positive. Just an observation with it, it is much, much harder to run through the sizing die than Hornady brass. I am at 7 firings with one batch and all is still well. (as expected)
My experience with .308 and 270 has been very frustrating. Die set up is a disaster.... Some cases need to be sized several times to fit the chamber, and some will push the shoulder back so far i have to segregate cases. I basically end up with shoulder bump all over the place, and overworked necks as many need sizing again....
I switched to Winchester 270 brass and problem solved. In 308 i switched to Hornady brass. Problem solved again. Availability is spotty though.
Pistol brass is pistol brass. All of it seems to work well, for so many firings i can't even keep track. (as expected)
I just pulled out some 5.56 Starline brass and am eager to try it out. It is ready to load on my bench right now. I won't have much info on that until i get through at least 4 firings, which will be awhile.
It seems i need to buy an annealing machine to make the Starline brass work. If it does, i will be very, very happy!!! I have purchased a lot of it in bulk during the thin times. Some lots of 308 brass i give up on as soon as the 2nd re-size.
I can't afford the AMP machine. And have been looking at a couple other options.
I noticed over on Accurate Shooter there is a long thread going. Each and every member there praises the brand. Some comparing it to Lapua. Many say it is much better than the normal Win, Fed & Rem. Also much cheaper. Many seem to have never fired it or reloaded it also. Maybe they have an unused bulk box of it. Or they heard someplace it was good.
I want to love it. I will start annealing and hope to salvage all of this brass. I am a fan of all things made in the USA. Especially brass makers, when most brass is out of stock nation-wide.