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I picked up on an older matter/article where others that have mentioned that a barrel possessing the “Oval P” might have been equipped by Winchester:
The nickel steel barrels are in the same way analyzed, getting subjected into a tension 30 per cent in excess of pressure created from the cartridge the barrel is meant to be chambered for. Following proof firing a barrel is carefully inspected and if it exhibits the slightest sign of strain, or imperfection, it is condemned. A barrel that passes the proof is upcoming straightened, and afterwards provided the second or “end” boring. It really is then straightened yet again, and then it is actually subjected to what is named the “Winchester” or “Guide” examination, which by no means fails to reveal any irregularity in the inside of the barrel. This take a look at is repeated once the barrel is rifled, for the purpose of detecting any attainable disturbance in the bore throughout the latter process.
I personally am not with the belief that Winchester ever used mail order barrels from the manufacturing facility to finish or fill orders. Doing this would indicate which they experienced operate absolutely out of normal production barrels… if that transpired often, someone (the shop foreman) required to be fired, or fire the person in control of ensuring that the assembly room personnel did not run out of the mandatory parts necessary to Establish guns.
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Also, you men have almost certainly previously observed this info but Listed here are scans with the 1899 Winchester Memorandum describing the marking system over the underside in the barrels Best places to buy Winchester rifles (at that time).
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For barrels & receivers made just after 1905: Receivers getting the “WP” evidence but no “WP” or “Oval P” proof around the barrel would reveal the barrel was changed beyond Winchester employing a pre-1905 barrel.
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