I have a Springfield 1903 that belonged to my father. He made a sporter stock for it, but as far as I know he did not alter the rifle's action at all. When I load rounds one at a time, it gives flawless reliability. WHen I load it via stripper clips, the bolt will often fail to pick up a new round from the magazine when I cycle it. Any ideas on what could be causing this and how to correct it? Thanks.