bought one three or so years ago. Shot it once the week I bought it. Then once a couple years later. Both times it didn't load the next round. Was going to take it to the range sat. so sat. morning I tore it down and polished up the ramp and top of the chamber. Still struggles to load the next round. Sometimes I can go three rounds just fine then it'll jamb the next few or every other one, etc. etc. Should I send it back or what?