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Old April 19, 2013, 10:37 PM   #1
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Join Date: May 16, 2008
Posts: 9,495
Receiver pressure limits

There is something I don't quite get. As I understand it the following is how MOST rifles work:
The bolt moves into battery and as it does lugs on the bolt connect with lugs on the barrel. The two are very tightly joined. The trigger is pulled and the barrel bolt form a closed system until the bullet leaves the barrel(well, close enough). At this point the bolt and barrel, still locked together recoil into the receiver, which recoils into the stock, which recoils into the shoulder. Why is it the bolt and barrel do not hold the pressure?

Why is it I can't but a 223 bolt, 223 barrel, and put it into any receiver that can handle equal recoil?
Why is it an AR upper can be made of polymer but a steel 1895 Steyr can't handle the pressure?
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