I recently picked up a s&w 340pd as a back-up gun for work. Im planning on loading it with a 38 spl's since i went out and fired some 357 magnums this morning and decided the power wasn't worth the pain. Since this is going to be a "last resort" gun I was looking at a close range blow-you-down round. Has anyone had any experiance with the extreme shock or Glaser rounds? any info or opinion would be great.