I owned a 527 in .223 during my rifle buying, selling and trading phase. It was a fine piece that shot MOA with most factory. With good handloads it would put them into 3/4's of an inch on a regular basis. I traded it when something else caught my fancy.
I noted two concerns. First the magazine lips were very hard on the brass and needed some smoothing. Secondly, the single-set trigger wasn't to my liking. I never did get it adjusted to a satisfactory let-off. YMMV.