Sorry if this has been covered somewhere, but most of what I find is regarding 2" snubbies, so please bear with me.
I've read that the 125 gr. .38 special Gold Dots (and other HP rounds) don't expand well out of a 2" barrel. Is that a concern when fired out of a 4" barrel? I recently aquired a 4" S&W 64 and while I don't plan on using it for defense, I figured it wouldn't hurt to at least have a quantity of solid defensive ammo for it. I'm just not sure if Gold Dots would be adequate for this or if I should look elsewhere.