[WeeWilly]

There isn't a caliber I can imagine myself using where I would consider FMJ as anything other than a last resort (or an excellent practice choice).

 

[WeeWilly]

The only one I can think of that might be even marginal would be a very fast FN 10mm.

I guess the way I see it, there are so many better options in just about every application, I can't think of why, except, no other choice. FMJ's have so many marginal attributes, they go through flesh in a very streamlined manner (mostly leaving a smaller than caliber hole in their wake). They tend to steer very weird courses. Sometimes that trait can be fortuitous (Jack Ruby comes to mind), sometimes less than desirable. In any case, the shooter has less control over where it is going to end up than just about any other option.