
12-18-2012, 05:48 AM
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Beartooth Regular
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Join Date: Oct 2011
Posts: 1,413
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The 1903 Springfield is a CRF magazine/action. All CRF rifles have a problem feeding a single round into the chamber, as opposed to feeding from the magazine. Most shooters of CRF rifles if they want to shot them single shot will load a single round into the magazine and let the rifle strip the single round out of the magazine and under the EXTRACTOR. Therefore it loads just like a multi shot feed CRF rifle.
The extractor is the problem in CRF rifles when single shooting. the Extractor has to "jump" over the case rim if the round is fed directly into the chamber. Many Mausers with CRF will not work or will break the extractor is single round direct feed is used. But on the Springfield, to help this inherent weakness, the front surface of the EXTRACTOR is slightly beveled (relieved). this gives the Single shot loader a chance to push harder and ramp the extractor over the case rim. Often CRF shooters will also push in on the rear half of the extractor with a finger as they close the action; this allows the extractor to see-saw a little and more easily "jump" the case rim.
So yes, single shot feeding of CRF is not great in most actions. The Springfield rifle, because it has a mag cut-off, anticipated this and beveled the front of the extractor...so you can do it without ruining your rifle.
Hope this explains what you had read.
Interesting, the mag-cut off and the single shot feed was seldom used by the military and never taught to troops. The cut-off was actually a bad feature, as a soldier in battle might have the mag-cut-off on "Blocked" and compromise his action. IIRC the military board made the Springfield armory add this feature during the development of the '03 as they feared to much ammunition would be wasted.
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