I’ve had good luck with the Prvi 55 grain, and I had hoped that it would be a viable yet less costly alternative to the xm193, but with the shortages and all that it’s become a matter of availability moreso than price.
I have a variety of 5.56 in my ammo cabinet to include Wolf, XM193, Prvi, and a crate of (I think) guat. One of these days I’d like to get out and do some accuracy and POA shift testing with all of them, but all I have are A1 barrel profiles and bench shooting bores me to tears.