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<blockquote data-quote="Darryl Cassel" data-source="post: 4552" data-attributes="member: 34"><p>John</p><p></p><p>The 30/338 or the 300 Win mag or the 300 RUM could all be 30" depending on what you want to do with any of these cartridges.</p><p></p><p>The 300 Win mag has more powder capacity then the 30/338 so it will give more velocity in the same length barrel. The 300 RUM has more powder capacity then the 300 Win mag and will give more velocity in the same length barrel if all are using the same bullet weight.</p><p></p><p>If you really want to increase the effectivness of the 300 RUM especially with 240 Gr Sierra MK bullets, I would go with a 34" to 36" barrel.</p><p></p><p>Usually blocks or sleeves are used when the barrel length goes over 32" or 34" depending on the diameter. If you have a tapored barrel of .950" (at the muzzle) or less, you may not need a block. </p><p></p><p>Most 1000 yd light Match guns with barrels of 30" don't have blocks. Some do but, not most.</p><p></p><p>Theres no set length of barrel for any particular cartridge. It's shooter preferance and how far he wants to reach out and touch something. If you want to send large high BC bullets in large overbore cases out to extreme range, get a longgggggg "Darryl Barrel."</p><p></p><p>During these winter evenings and mornings, I usually hit the forums to see what has been asked during the day or night. I do sleep, honest.</p><p></p><p>Good luck to you with your decision.</p></blockquote><p></p>
[QUOTE="Darryl Cassel, post: 4552, member: 34"] John The 30/338 or the 300 Win mag or the 300 RUM could all be 30" depending on what you want to do with any of these cartridges. The 300 Win mag has more powder capacity then the 30/338 so it will give more velocity in the same length barrel. The 300 RUM has more powder capacity then the 300 Win mag and will give more velocity in the same length barrel if all are using the same bullet weight. If you really want to increase the effectivness of the 300 RUM especially with 240 Gr Sierra MK bullets, I would go with a 34" to 36" barrel. Usually blocks or sleeves are used when the barrel length goes over 32" or 34" depending on the diameter. If you have a tapored barrel of .950" (at the muzzle) or less, you may not need a block. Most 1000 yd light Match guns with barrels of 30" don't have blocks. Some do but, not most. Theres no set length of barrel for any particular cartridge. It's shooter preferance and how far he wants to reach out and touch something. If you want to send large high BC bullets in large overbore cases out to extreme range, get a longgggggg "Darryl Barrel." During these winter evenings and mornings, I usually hit the forums to see what has been asked during the day or night. I do sleep, honest. Good luck to you with your decision. [/QUOTE]
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