The only thing "wrong" with Rainier bullets is the 1200 FPS limit on the velocity because of the thin coating. This applies to all plated bullets not just Rainier. I shoot a lot of plated bullets in 9mm 40 and .45 and have had no problems. Precision Bullets are also an excellent less expensive option to FMJ.
"To disarm the people is the best and most effectual way to enslave them."
Texas and Louisiana CHL instructor. NRA instructor: Rifle, Pistol. Shotgun, Personal Protection, Refuse To Be A Victim.