First three comments practically settle it . . . I only asked (on his behalf) because there appears to be some “controversy” when I did the research (on his behalf).
I use Winchester silvertips in my Beretta Tomcat. (.32 ACP) no prob.
But some older pieces, like my Browning Hi-power, are not reliable with JHP.
Proof is in the shooting. Tell him to break down, buy a box, and shoot them.