I have had this SR22 for several months and just got around to taking it to the range today to play while Lefty shot her 640. The first 50 or so rounds went through it flawlessly, a mix of Remington thunderbolt 40 grain and Winchester 36 grain copper plated. All of a sudden it started to not to chamber the next round from the magazine and as time went on it also started to fail to eject the spent rounds. Has anyone had a similar problem such as this.