push round feed/controlled round feed

[deserthntr]

Was wondering what the difference is between the 2? Thanks

[Benbrown]

Was wondering what the difference is between the 2? Thanks

In a controlled round feed (CRF) rifle, the cartridge is captured by the bolt as it comes up out of the magazine and "controlled" until it is seated in the chamber. In a push feed, cartridges are pushed out from under the feed lips of the magazine and lay in the rails on top of the next round or magazine follower (if there are no more rounds in the magazine) until the bolt pushes the cartridge forward into the chamber. In a push feed, the cartridge laying in the rails could conceivably be jarred out of alignment or even out of the rifle by sudden movement, or by a sudden movement of the bolt. This means that one would have to draw the bolt back and pick up another cartridge from the magazine and chamber it before the rifle could be fired again. It is mostly a concern in dangerous game rifles where the operator may be nervous, under duress and more likely to do something to cause the cartridge that just came out of the magazine to be dumped. Most military Mauser actions (and many commercial Mausers) will not chamber a round unless it is pushed up from the magazine and the rim is caught under the extractor. If you just drop a round in the action and push the bolt forward, the cartridge will be seated in the chamber, but the bolt won't close and the rifle won't fire until the cartridge in the chamber is removed. In rifles like the pre-64 Winchesters and the post-64 Classics, the extractor will slide over the rim of a cartridge that is dropped in the action. Most military Mauser actions that are sporterized have the extractors modified so that they will chamber a round that is just dropped in the action. There are also rifles without the Mauser-type long extractor that are CRF, as well.

 

Hope this helps.

[Chef]

http://www.youtube.com/watch?v=GZZphk6JWfQ

[deserthntr]

Awesome thanks guys