When the EFMJ first came out in 45acp, you could get the 230gr bullet weight. I shot them for years in my 1911's, Sig P-220, Sig P-245 and even in my first Taurus PT-145. I never hand any function problems with them in any of those guns.
I decided to see if they actually performed according to what I had read about them. I shot about everything I could to try to make them malfunction and not expand and in every test, from every gun except the Sig P-245, they mushroomed according to the design. WIth the Sig I had one whole box of 50 that only partially mushroomed or did not mushroom at all. They were accurate, almost boringly. When I heard that Federal were making them LEO only, I wanted to scream. I have not tried the 200gr. or the 9mm version as of this post.
bigmike45