thanks Bruce, I don't believe mine has a hole but I'm not 100% sure. Next time I break it down I will look and see but if my memory serves,the only hole in the bottom of mine is where the bottom of the extractor is. Thanks for your knowledge, I did not know Underwood made round bolts in 1948 & 49.I will also have to unwrap my New Old Stock one again and see if it has a small hole too. With all the later upgrades on my carbine, it would not surprise me at all if both of my bolts in fact end up having drainage or oil holes. but as many times over the 10 years or more that I have owned my carbine and broke the bolt down for cleaning, I don't remember seeing a small hole in the bottom.Information
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