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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Anyone own a 7mm 300 Win Mag?
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<blockquote data-quote="pyroducksx3" data-source="post: 434326" data-attributes="member: 20443"><p>So here's what I think I understand..... the 300 win mag has a much larger case capacitycompared to the 300wsm, which is why I cant seem to find the supporting data of the 7mm wsm reaching these velocites. Also Im not sure how much difference it makes but if it appears it two bullets ofthe same weight in close diameters are pushed by the same powder charge , the smaller diameter willgo faster? ie .284 vs .308, so a 77 gr charge of H-1000 will push the 150 gr .284 faster than a 77 gr charge of H-1000 of a 150 gr .308. I assume this is because the .284 develops higher pressue? Also in these magnums 4" barrel length can account for as much or more than 200 fps. What really throws me is how say the 7-300 win mag using 79 gr of H-1000 in a 28" barrel can push the same bullet faster than a 7RUM using a 26" barrel using 87 gr of H-1000. as stated earlier they have a 7-300 wm with a 28" barrel using 79 gr of H-1000 pushing a 162 gr amax at a velocity of 3340 fps. Compare that the hornady manual the 7 RUM with a 26" barrel using a charge of 87.3 of H-1000 pushing a 162 gr amax to a velocity of only 3100 fps. Is this just the efficiency of the cartridge? If so somebody ie Remington, winchester missed the boat and should have made this a factory round.</p></blockquote><p></p>
[QUOTE="pyroducksx3, post: 434326, member: 20443"] So here's what I think I understand..... the 300 win mag has a much larger case capacitycompared to the 300wsm, which is why I cant seem to find the supporting data of the 7mm wsm reaching these velocites. Also Im not sure how much difference it makes but if it appears it two bullets ofthe same weight in close diameters are pushed by the same powder charge , the smaller diameter willgo faster? ie .284 vs .308, so a 77 gr charge of H-1000 will push the 150 gr .284 faster than a 77 gr charge of H-1000 of a 150 gr .308. I assume this is because the .284 develops higher pressue? Also in these magnums 4" barrel length can account for as much or more than 200 fps. What really throws me is how say the 7-300 win mag using 79 gr of H-1000 in a 28" barrel can push the same bullet faster than a 7RUM using a 26" barrel using 87 gr of H-1000. as stated earlier they have a 7-300 wm with a 28" barrel using 79 gr of H-1000 pushing a 162 gr amax at a velocity of 3340 fps. Compare that the hornady manual the 7 RUM with a 26" barrel using a charge of 87.3 of H-1000 pushing a 162 gr amax to a velocity of only 3100 fps. Is this just the efficiency of the cartridge? If so somebody ie Remington, winchester missed the boat and should have made this a factory round. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Anyone own a 7mm 300 Win Mag?
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