Howdy W,
I had problems like you describe. It drove me nuts. I had three mags and all of them did it to some degree. I tried different loads but found the front part of the magazine lips were open too much.
A buddy showed me a near new Colt in .38 special and I was amazed how the rounds snapped in.
I set mine to where they did the same and all my problems went away. I dont remember the last time I had a FTF.
I set them at .356 I.D..
This may or may not help you but it sure made my 52 reliable.
I shoot 3. of 231 and a Remington 148 HBWC.
My luck was I had a magazine that was bought old, rusty and cheap. I adjusted it first figuring I was not out much if it didn't work. Once it did I set them all up @ .356 and all of them went to work.
Best of luck
Mike