It only happens when I'm chambering the first round from a fresh magazine. I love the gun but it's a bit concerning. Round will be 3/4 of the way in and just hang up. I have to bump the slide to get it to chamber. Gun has about 500 rounds through it. I bought it used. Has happened about 6 times. Gun is always very clean and oiled between shooting sessions. Should I send it back to Ruger?