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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Which 7mm to build???
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<blockquote data-quote="Long Time Long Ranger" data-source="post: 599032" data-attributes="member: 505"><p>You want 1000 yard hunting capability with the most barrel life. This scratches this whole 7mm thread from the start. Not the caliber for these two combinations. The 300 wsm has amazing barrel life and with the 210 berger at over 2900 fps will kill deer at 1000 yards. If you are talking elk at 1000 yards you need to trash the whole 7mm thread and look larger caliber from the start. The 300 winchester is good with a little less barrel life than the 300 wsm. The belt is not a problem for feeding or anything else and most top shooters headspace off the shoulder even with belted cartridges.</p><p> </p><p>Basically you need to decide exactly what the top priority is you want out of this rifle and focus on that. More barrel life or 800 yards instead of 1000 for instance. That could change your caliber right off the bat. Less expensive for reloading to shoot a lot for practice. Think about these things and don't pick a caliber yet until you decide exactly what your priorities are. </p><p> </p><p>I have read over the velocities reported on here. I own several of these rifles that have been discussed and have shot them all since the 70's except the 7mm-300 winchester. I haven't done that one since the 70's going for the more powerful 7 stw and 7mm-300 wby. With the new long high bc vld bullets available now the 300 winny necked down has a resurgence because it is a shorter case and will feed these long bullets easier. With the stw and wby they are single shot pretty much. I would not expect to get 3000 fps with a 180 grain bullet out of a 7mm rem mag or 3200 fps out of a 7mm-300 winchester. Some rifles may get that but the averages will fall short. I will admit my loads were worked up before some of the newer powders and bullets were available. Using the 175 grain SGK which was about the best you could do for years with the 7mm. A 7mm remington would drive that bullet max on average about 2850 fps with any kind of brass life. The 7mm-300 winchester would drive it around 3050 fps tops. So evidently some of the newer powders are bringing new life into these older cartridges. Or, as in the case of some of my rifles, they are hitting on the high side of the velocity spectrum. </p><p> </p><p>I have some that just shoot way beyond where they should and have built a few for other people. Like a 300 winchester that shoots 180 grain bullets 3350 fps and a 300 wby shooting them 3400 fps accurately without pressure signs. About 200 fps beyond where they should be. I wish I knew what made these rifles do that because I could make a mint. Some of the velocities listed in the threads could be from very fast barrels. From my experience though and the powders I have used these are not the velocities an average guy could expect from these cartridges. I am not saying these guys did not get what they say because fast barrels happen. I just think the average barrel may be less than that.</p><p> </p><p>I just wanted to add a 300 winchester with 180 grain bullets will average 3150 fps top end. Reducing the caliber to .284 (7mm) will reduce that velocity significantly. I have numerous 7mm STW's and 7mm-300 WBY's. They all will average around 3200 fps with a 175 grain SGK tops on average. These are more powerful rifles than the smaller 7mm-300 winchester. So that is what I am basing this on. I do have one really fast 7mm-300 wby at 3350 fps but I do not list that as an average rifle velocity a guy might expect out of that cartridge.</p></blockquote><p></p>
[QUOTE="Long Time Long Ranger, post: 599032, member: 505"] You want 1000 yard hunting capability with the most barrel life. This scratches this whole 7mm thread from the start. Not the caliber for these two combinations. The 300 wsm has amazing barrel life and with the 210 berger at over 2900 fps will kill deer at 1000 yards. If you are talking elk at 1000 yards you need to trash the whole 7mm thread and look larger caliber from the start. The 300 winchester is good with a little less barrel life than the 300 wsm. The belt is not a problem for feeding or anything else and most top shooters headspace off the shoulder even with belted cartridges. Basically you need to decide exactly what the top priority is you want out of this rifle and focus on that. More barrel life or 800 yards instead of 1000 for instance. That could change your caliber right off the bat. Less expensive for reloading to shoot a lot for practice. Think about these things and don't pick a caliber yet until you decide exactly what your priorities are. I have read over the velocities reported on here. I own several of these rifles that have been discussed and have shot them all since the 70's except the 7mm-300 winchester. I haven't done that one since the 70's going for the more powerful 7 stw and 7mm-300 wby. With the new long high bc vld bullets available now the 300 winny necked down has a resurgence because it is a shorter case and will feed these long bullets easier. With the stw and wby they are single shot pretty much. I would not expect to get 3000 fps with a 180 grain bullet out of a 7mm rem mag or 3200 fps out of a 7mm-300 winchester. Some rifles may get that but the averages will fall short. I will admit my loads were worked up before some of the newer powders and bullets were available. Using the 175 grain SGK which was about the best you could do for years with the 7mm. A 7mm remington would drive that bullet max on average about 2850 fps with any kind of brass life. The 7mm-300 winchester would drive it around 3050 fps tops. So evidently some of the newer powders are bringing new life into these older cartridges. Or, as in the case of some of my rifles, they are hitting on the high side of the velocity spectrum. I have some that just shoot way beyond where they should and have built a few for other people. Like a 300 winchester that shoots 180 grain bullets 3350 fps and a 300 wby shooting them 3400 fps accurately without pressure signs. About 200 fps beyond where they should be. I wish I knew what made these rifles do that because I could make a mint. Some of the velocities listed in the threads could be from very fast barrels. From my experience though and the powders I have used these are not the velocities an average guy could expect from these cartridges. I am not saying these guys did not get what they say because fast barrels happen. I just think the average barrel may be less than that. I just wanted to add a 300 winchester with 180 grain bullets will average 3150 fps top end. Reducing the caliber to .284 (7mm) will reduce that velocity significantly. I have numerous 7mm STW's and 7mm-300 WBY's. They all will average around 3200 fps with a 175 grain SGK tops on average. These are more powerful rifles than the smaller 7mm-300 winchester. So that is what I am basing this on. I do have one really fast 7mm-300 wby at 3350 fps but I do not list that as an average rifle velocity a guy might expect out of that cartridge. [/QUOTE]
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Which 7mm to build???
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