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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
195 grain 7mm Berger - How Much Cartridge Will it Need?
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<blockquote data-quote="Edd" data-source="post: 962502" data-attributes="member: 30592"><p>When I first heard about 195 gr 7mm bullets, I decided to build something to shoot them. I bought 300 Norma cases and RUM cases to examine. I even drew up reamer prints for them. My statement about the body of the 28 Nosler having a larger capacity than the body of your cartridge is correct. You have to fill the neck and shoulder to get more volume from your case. You can also seat the bullets like you picture and give the advantage to your cartridge. If you seat the base of the bearing surface of a bullet at the neck shoulder junction, your cartridge won't hold more water. The 28 Nosler will be longer but it will still work in a standard magazine. A 7mm bullet consumes about 1 grain of water per 1/16".</p><p></p><p>I have since given up on the 195 gr bullets. I sold my 7mm barrel and ordered a 30 cal to replace it. I've modified my 7mm reamer print to a 30 cal and am going to build one of those. My cartridge isn't exactly like the 26 Nosler but it is close.</p><p></p><p>If the 7mm PRO has an advantage it will be because the fat case has an efficiency advantage. I've heard, many times, that they do but have never seen any data to support the claim and I've looked for some.</p></blockquote><p></p>
[QUOTE="Edd, post: 962502, member: 30592"] When I first heard about 195 gr 7mm bullets, I decided to build something to shoot them. I bought 300 Norma cases and RUM cases to examine. I even drew up reamer prints for them. My statement about the body of the 28 Nosler having a larger capacity than the body of your cartridge is correct. You have to fill the neck and shoulder to get more volume from your case. You can also seat the bullets like you picture and give the advantage to your cartridge. If you seat the base of the bearing surface of a bullet at the neck shoulder junction, your cartridge won't hold more water. The 28 Nosler will be longer but it will still work in a standard magazine. A 7mm bullet consumes about 1 grain of water per 1/16". I have since given up on the 195 gr bullets. I sold my 7mm barrel and ordered a 30 cal to replace it. I've modified my 7mm reamer print to a 30 cal and am going to build one of those. My cartridge isn't exactly like the 26 Nosler but it is close. If the 7mm PRO has an advantage it will be because the fat case has an efficiency advantage. I've heard, many times, that they do but have never seen any data to support the claim and I've looked for some. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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195 grain 7mm Berger - How Much Cartridge Will it Need?
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