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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Tomahawk (300 RUM imp.) vs WarBird???
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<blockquote data-quote="Len Backus" data-source="post: 31463" data-attributes="member: 1"><p>Chris</p><p></p><p>Sorry if I sounded condescending to you. Didn't mean to. You seem to be a very knowledgeable, experienced shooter and gun owner...much more so than I. I would never try to talk down to you. I would be found out in a flash. If you notice, I usually let others provide the tough technical answers on this forum because there are probably 500 members here with more technical knowledge than I...yourself included. But I think I am right on this issue.</p><p></p><p>I know this is a sensitive issue to Tomahawk owners so I tried to be careful in my post. Again, sorry. </p><p></p><p>My response was directed to the original poster, too, since he seems to want to make an expensive decision about cartridge performance based mostly on case capacity differences.</p><p></p><p>Did you measure a new, unfired RUM case and compare it to a fire-formed Tomahawk case? There is somewhere around 2 to 3 grains gained simply by firing any case and comparing it to the capacity of a new, unfired case. When I use a Stoney Point tool to measure headspace on a new 7mm Dakota case for example, the base-to-shoulder dimension is 10 thousandths shorter than with a fire-formed case. Diameter at the shoulder is smaller also.</p><p></p><p>How much velocity gain do you think is achieved over that of the RUM?</p><p></p><p>I have a new rifle chambered in my favorite 7mm Dakota. The new rifle is safely getting about 75 fps more velocity than 2 previous 7mm rifles of mine. Same barrel length, etc. Same fire-formed case capacity. Same apparent lack of pressure signs. Someone with a pressure measuring device whould maybe tell me there is a difference in pressure, however. My point here is that simply observing higher velocity in one gun doesn't mean it was due to higher case capacity.</p><p></p><p>[ 03-29-2004: Message edited by: Len Backus ]</p></blockquote><p></p>
[QUOTE="Len Backus, post: 31463, member: 1"] Chris Sorry if I sounded condescending to you. Didn't mean to. You seem to be a very knowledgeable, experienced shooter and gun owner...much more so than I. I would never try to talk down to you. I would be found out in a flash. If you notice, I usually let others provide the tough technical answers on this forum because there are probably 500 members here with more technical knowledge than I...yourself included. But I think I am right on this issue. I know this is a sensitive issue to Tomahawk owners so I tried to be careful in my post. Again, sorry. My response was directed to the original poster, too, since he seems to want to make an expensive decision about cartridge performance based mostly on case capacity differences. Did you measure a new, unfired RUM case and compare it to a fire-formed Tomahawk case? There is somewhere around 2 to 3 grains gained simply by firing any case and comparing it to the capacity of a new, unfired case. When I use a Stoney Point tool to measure headspace on a new 7mm Dakota case for example, the base-to-shoulder dimension is 10 thousandths shorter than with a fire-formed case. Diameter at the shoulder is smaller also. How much velocity gain do you think is achieved over that of the RUM? I have a new rifle chambered in my favorite 7mm Dakota. The new rifle is safely getting about 75 fps more velocity than 2 previous 7mm rifles of mine. Same barrel length, etc. Same fire-formed case capacity. Same apparent lack of pressure signs. Someone with a pressure measuring device whould maybe tell me there is a difference in pressure, however. My point here is that simply observing higher velocity in one gun doesn't mean it was due to higher case capacity. [ 03-29-2004: Message edited by: Len Backus ] [/QUOTE]
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Tomahawk (300 RUM imp.) vs WarBird???
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