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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="Kiwi Nate" data-source="post: 442107" data-attributes="member: 8533"><p>Good stuff, glad you are enjoying the process.</p><p></p><p>Case capacity between the 7/300 and my Practical is identical. People do seem to get carried away with the idea of shifting a shoulder angle forwards to increase capacity but it really means squat. There is plenty of powder space in there, 77 grains of H1000 or Retumbo fits easily with room to spare and I have just put 85 grains US 869 into a case as a start load for experimenting and again, plenty of room. My fireform loads have the standard 25 degree shoulder. I only opted for 30 degrees as a means of aiding positive headspace. That and I also noticed that cartridges with 30 degree shoulders tend to grow the necks rapidly which was desirable as the Practical is a long neck design for optimum bullet to bore concentricity.</p><p></p><p>If you need to FL size, you will have two options. The first is to have PTG send a drawing to Hornady and they can make a die, they really do a very good job of this. The second option is that you neck down as per usual with the neck die, then use a .300 FL die for the shoulder and body, being sure to remove the expander spindle.</p><p></p><p>In the Practical, I would have to use a Hornady custom made die. Its no big deal, not really any different to ordering a standard die set. That said, I try to avoid having to FL size altogether. I guess the main thing is to not push the brass beyond its pressure limits. I believe this is how I am able to neck size year in year out without having to FL size brass in our rifles.</p></blockquote><p></p>
[QUOTE="Kiwi Nate, post: 442107, member: 8533"] Good stuff, glad you are enjoying the process. Case capacity between the 7/300 and my Practical is identical. People do seem to get carried away with the idea of shifting a shoulder angle forwards to increase capacity but it really means squat. There is plenty of powder space in there, 77 grains of H1000 or Retumbo fits easily with room to spare and I have just put 85 grains US 869 into a case as a start load for experimenting and again, plenty of room. My fireform loads have the standard 25 degree shoulder. I only opted for 30 degrees as a means of aiding positive headspace. That and I also noticed that cartridges with 30 degree shoulders tend to grow the necks rapidly which was desirable as the Practical is a long neck design for optimum bullet to bore concentricity. If you need to FL size, you will have two options. The first is to have PTG send a drawing to Hornady and they can make a die, they really do a very good job of this. The second option is that you neck down as per usual with the neck die, then use a .300 FL die for the shoulder and body, being sure to remove the expander spindle. In the Practical, I would have to use a Hornady custom made die. Its no big deal, not really any different to ordering a standard die set. That said, I try to avoid having to FL size altogether. I guess the main thing is to not push the brass beyond its pressure limits. I believe this is how I am able to neck size year in year out without having to FL size brass in our rifles. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Anyone own a 7mm 300 Win Mag?
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