If I recall my statistics corrrectly,...
as few as 9 samples randomly drawn from the population will get us into the low 90th (-ish) percentile. Over 40 should get us well into the upper 90's (if not 99%+) degree of certainty. I am sure that someone here will be better equipped to speak to this though as that was a long time ago for me ... regardless, statistically speaking it would sound something like "it is highly unlikely to be a coincidence and would instead appear to a very high degree of certainty to be significant", or soemthing like that.
Statistics always did drive me nust because quite honestly even if that is correct then what the heck did that just say ... I said I am pretty sure that I think it is possible ... really sure, ... probably, ... I think, ....
:D
No, there is no "Overton" notch
There is no Overton notch on these stocks, and yes, they are original equipment on many IHCs in the 5.11M to 5.17M ranges. I have documented several hundred of them now, and actually own three original IHC rifles with this "HRA-style" stock. As a matter of fact, this "HRA-style" stock actually is the predominate stock in the 5.16M range.
There is a key identifier to spotting one of these stocks, but I will not name it here. It seems that most of my postwar ID work has been pirated, packaged, and is now being sold as the M1 Garand Photo Essay.
No numbers in the channel.
There are no numbers in the channels of these HRA-style stocks. It is my personal opinion that these stocks were shipped directly from HRA to IHC. There is a reason for this, and other parts exchanges in mid-1955 (i.e. IHC DRC windage knobs on SA rifles) but I will break that fact in my IHC book. :cheers: --- GWB