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Factory ammo in custom chambers
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<blockquote data-quote="J E Custom" data-source="post: 554322" data-attributes="member: 2736"><p>Over the years I have seen factory ammo that was loaded to hot for "Custom" chambers and </p><p>have experienced this again with the new Superformance ammo.</p><p></p><p>Note;This is not a criticism of the ammo just a warning if it is used in anything but a SAMMI</p><p>chamber.</p><p></p><p>With out a doubt, it does prodeuce more velocity. But in all of the SAMMI chambered rifles it</p><p>was tested in it is "MAX" Pressure and the signs were present (Heavy bolt lift,ejector marks on </p><p>the case head and flat primers.</p><p></p><p>I have not tested it in a factory chambered rifle so any input would be appreciated to put </p><p>everything into perspective.</p><p></p><p>Most on this site load there own ammo and start low and work up, But some use factory ammo </p><p>to form a basis for accuracy and velocity, and use it to do break in on new barrels. My concern</p><p>is that someone will use the HOT factory ammo on there short throat ed,Tight necked minimum</p><p>free bore chambered rifle and have problems.</p><p></p><p>This is not the first ammo that has not been suitable for custom chambers, My first experance with</p><p>this probablem was the big Weatherby cartriges that were loaded to the Max for there factory rifles</p><p>with tons of free bore. If this ammo was fired in a custom chamber with tighter dimensions and </p><p>little or no free bore it would blow the primers and cause heavy bolt lift.</p><p></p><p>So if you have a custom chamber and want to get more velocity some factory loaded ammo may</p><p>cause problems and could even be dangerous.</p><p></p><p>As stated earlier, This ammo has performed well and with the longer peak pressure curve has</p><p>all the things we want in order to achieve max velocity, but there is no free ride and make no </p><p>mistake about it these are MAXIMUM pressures and come with the problems associated with</p><p>Maximum loads.</p><p></p><p>MY recommendations for what it's worth, is not to shoot any of the high pressure ammo in a custom</p><p>chamber unless it is SAMMI spec.</p><p></p><p>Comments are more than welcome. It may keep someone from having a problem or even getting</p><p>hurt.</p><p></p><p>Just a heads up</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 554322, member: 2736"] Over the years I have seen factory ammo that was loaded to hot for "Custom" chambers and have experienced this again with the new Superformance ammo. Note;This is not a criticism of the ammo just a warning if it is used in anything but a SAMMI chamber. With out a doubt, it does prodeuce more velocity. But in all of the SAMMI chambered rifles it was tested in it is "MAX" Pressure and the signs were present (Heavy bolt lift,ejector marks on the case head and flat primers. I have not tested it in a factory chambered rifle so any input would be appreciated to put everything into perspective. Most on this site load there own ammo and start low and work up, But some use factory ammo to form a basis for accuracy and velocity, and use it to do break in on new barrels. My concern is that someone will use the HOT factory ammo on there short throat ed,Tight necked minimum free bore chambered rifle and have problems. This is not the first ammo that has not been suitable for custom chambers, My first experance with this probablem was the big Weatherby cartriges that were loaded to the Max for there factory rifles with tons of free bore. If this ammo was fired in a custom chamber with tighter dimensions and little or no free bore it would blow the primers and cause heavy bolt lift. So if you have a custom chamber and want to get more velocity some factory loaded ammo may cause problems and could even be dangerous. As stated earlier, This ammo has performed well and with the longer peak pressure curve has all the things we want in order to achieve max velocity, but there is no free ride and make no mistake about it these are MAXIMUM pressures and come with the problems associated with Maximum loads. MY recommendations for what it's worth, is not to shoot any of the high pressure ammo in a custom chamber unless it is SAMMI spec. Comments are more than welcome. It may keep someone from having a problem or even getting hurt. Just a heads up J E CUSTOM [/QUOTE]
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