Join Date: Jan 2012
Location: Northern Ozarks of Missouri
Actually both these guys are right and they are both wrong at the same time.
I don't fully understand it myself, but it has to do with the amount of pressure generated by the cartridge and the diameter of the case head. Take for instance the 45/70 is a very low pressure cartridge but has a large case and head diameter. Somehow that works, because like SEM said the larger hammer with the larger amount of force exerted against the breach face. But a high pressure cartridge with a large case head diameter exerts too much push back on the frame. The smaller case diameter even though it has more pressure has less diameter to contact the breach face, so there in has much less pushback because of the size of the case head. It all has to do basically with the more push back on the frame, the more it is apt to stretch the frame along the top of it. That is why the G2 with it's support on the sides of the frame along the top will allow a somewhat higher pressure level cartridge to be fired the the original Contender. If you were to produce a test that would measure pushback on cartridges you would discover that the smaller head diameter of the 223 although a higher pressure round does not have the pushback that the 45/70 has because of the pressure variance.
I hope that this makes a little since to you, and perhaps does not make it even harder to understand.
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