Hello all, This is my first post. I happened to come across this site while searching for some info on the concern I had with my Ruger GP100. I have owned the gun for about 10 years with no problems. Not a lot of shooting has been done with this gun. In March of 2009 I went out to shoot and was using Remington UMC 38spl. ammo. A few weeks prior I shot 2 rounds out of the gun and noticed I did not hit anything. In March I went back out to shoot and when I pulled the trigger the gun fired, but it was very quiet. No recoil or nothing happened. A little bit of smoke came out around the cylinder area. Long story short, what I found out later that day was 2 bullets were jammed in the barrel. The 2 rounds I shot weeks before. The 3rd bullet I tried to shoot was of course the end. I know I should of cleaned the gun weeks before, but I really did not think I would have to clean it after only 2 shots. I sent the gun to Ruger who in turn sent me a bill to repair the gun. The barrel was bulged and so on. I feel pretty lucky. I contacted Remington and they told me that it was because I was using 38spl. ammo. Remington agreed to fix the gun and sent the money to Ruger. The guy at Remington told me, now get this, the 38spl. ammo uses less powder so when you load the gun and keep it down toward the ground the powder in the bullets moves forward, away from the pimer, and that is why the 2 previous bullets did not exit the barrel. Of course the 3rd just got jammed behind the other 2 and bulged the barrel. The guy at Remington told me after loading the gun I need to hold the gun upward so the powder moves back down toward the primer or simply use 357 mag. ammo only. I'm not an expert, but I find this hard to believe. My opinion is the ammo was simply junk. As of this writing I'm still waiting for my gun to come back. I called last week and Ruger said the gun was at the range being tested. Any opinions or advice? I don't fault the firearm, but this is my home defense weapon. How do I know the weapon will perform when needed? Sorry for the long post. Thanks in advance for any and all responses.