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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
long range 7mm cartridges
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<blockquote data-quote="Long Time Long Ranger" data-source="post: 490591" data-attributes="member: 505"><p>TMR hit the nail on the head, it depends on reamers. The Dakota and the STW are the fastest of these. The weatherby and remington are next followed by the wsm. On average with same throat designs your looking at around 250 fps from top to bottom. </p><p> </p><p>With the ones I have shot 2900's are tops safely with the remington and wsm. TMR's reamers may allow for more velocity depending on throat design, etc. I was just speaking in general terms considering factory chamberings. I have never got 3000's with the remington or wsm in the ones I have shot. I have two 7mm remingtons and they top out in the 2900's absolute max with a 175 grain bullet. These are with 26" barrels. The STW will shoot 200 fps faster than either of these. </p><p> </p><p>As far as the 7mm wby with factory rifles it will average 100 fps faster than the 7mm remington. The Mk5 wby rifles chambered in 7mm wby have the wby freebore which adds velocity. Factory rifles offered in 7mm remington do not have freebore and are 100 fps slower on average than the 7mm wby. Loading manuals typically use factory rifles so there is your difference. With a custom reamer and varying throat designs all goes out the window. You can take 308 norma brass and neck it to make the 7mm remington, 7mm wby, 264 winchester, 270 wby, 257 wby, 338 winchester, etc, etc. They are all virtually the same case and capacity. Cartridges off this case can not compete with cartridges based off the full length H&H magnum case such as the STW's, 300 and 340 wby's, etc. You will jump 150-200 fps on avergae with this extra powder capacity. There are no free lunches. Look at case capacity and design and if those are similar performance will be similar. Throat designs and such can alter the velocity some but if somebody claims amazing velocity out of the ordinary somethings not right.</p><p> </p><p>I did not see where you said mostly targets and little hunting. But considering that I recomend the 7mm wsm if you want to stick with a 7mm. It has better barrel life, is extremely accurate at long range and a pleasure to shoot with lighter recoil. The short cartridge allows for plenty of room to allow for long vld bullets to be seated out to the lands. This makes it a good choice to easily do on any magnum action. If you are looking at long range hunting get the STW. It is cheaper and easier to get components than the Dakota. Either are excellent long range hunters.</p></blockquote><p></p>
[QUOTE="Long Time Long Ranger, post: 490591, member: 505"] TMR hit the nail on the head, it depends on reamers. The Dakota and the STW are the fastest of these. The weatherby and remington are next followed by the wsm. On average with same throat designs your looking at around 250 fps from top to bottom. With the ones I have shot 2900's are tops safely with the remington and wsm. TMR's reamers may allow for more velocity depending on throat design, etc. I was just speaking in general terms considering factory chamberings. I have never got 3000's with the remington or wsm in the ones I have shot. I have two 7mm remingtons and they top out in the 2900's absolute max with a 175 grain bullet. These are with 26" barrels. The STW will shoot 200 fps faster than either of these. As far as the 7mm wby with factory rifles it will average 100 fps faster than the 7mm remington. The Mk5 wby rifles chambered in 7mm wby have the wby freebore which adds velocity. Factory rifles offered in 7mm remington do not have freebore and are 100 fps slower on average than the 7mm wby. Loading manuals typically use factory rifles so there is your difference. With a custom reamer and varying throat designs all goes out the window. You can take 308 norma brass and neck it to make the 7mm remington, 7mm wby, 264 winchester, 270 wby, 257 wby, 338 winchester, etc, etc. They are all virtually the same case and capacity. Cartridges off this case can not compete with cartridges based off the full length H&H magnum case such as the STW's, 300 and 340 wby's, etc. You will jump 150-200 fps on avergae with this extra powder capacity. There are no free lunches. Look at case capacity and design and if those are similar performance will be similar. Throat designs and such can alter the velocity some but if somebody claims amazing velocity out of the ordinary somethings not right. I did not see where you said mostly targets and little hunting. But considering that I recomend the 7mm wsm if you want to stick with a 7mm. It has better barrel life, is extremely accurate at long range and a pleasure to shoot with lighter recoil. The short cartridge allows for plenty of room to allow for long vld bullets to be seated out to the lands. This makes it a good choice to easily do on any magnum action. If you are looking at long range hunting get the STW. It is cheaper and easier to get components than the Dakota. Either are excellent long range hunters. [/QUOTE]
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