THERE IS A WHOLE TREAD ON THESE BLANKS USE THE SEARCH. AOME ARE SAID TO BE SOFT MAOST ARE OK THERE APPEARS TO BE SEVERAL VERSIONS
Yeah, I read the threads here, and at another forum. Still confusing It appears that the blanks with the x,y and selector markings are good to go, just need the fcg heat treated, however some have said even those are soft. The ones I have do not deform, so I assume they are not the 1050, which would bend easily.
I'll find out after I have a couple hundred rounds through the first one I guess