I just noticed that on my 700 bolt body, about 3/8" back from the locking lugs, there appears to be a "filled hole", about 6/32 in diameter. Is this from the manufacturing process? This is for a stainless steel magnum bolt if that makes any difference. I haven't noticed this on any other bolts so I'm kind of curious where this comes from! My theory is that since the bolt head and body are made from two different metals, this is some kind of pin to hold them together.