I got a quick question hopefully someone can shed some light one. I recently purchased a used 220 at a gun show, it hasn't had more than a hundred rounds through it if that, and I noticed while trying to familiarize myself with it before I head to the range that unless I let the slide slam forward, that it didn't seem to want to consistently extract the (magazine fed) round. The reason that I ask is because I've also got a HK USP40 that I bought new, and if operated in the same way will always extract the round. Is this just the difference in an external vs. internal extractor or what? I've been raised around long guns but have only got into handguns within the last 8 months or so and wasn't sure if I'm just being paranoid or ignorant to how the 220 should operate. Any words of wisdom would be appreciated.