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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
High velocity chamberings known for having exceptional accuracy.
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<blockquote data-quote="AZShooter" data-source="post: 919548" data-attributes="member: 5219"><p>6mm-284 is NOT the mach IV. Mach IV is a necked down 264 win mag!</p><p></p><p>I have a 6mm-284 and am very impressed with the 105 Berger match target hybrid sent out at 3445 fps from a 28" barrel. </p><p></p><p>I have actually considered making a 6mm-264. The reason is that Berger bullet. I have a magnum boltface LA rifle that has a tired 257 weatherby barrel. I could rebarrel to the 257 or make a 7 rem mag or some other hard kicking magnum but I thought wouldn't it be fun to try the 105s in a sporter weight with the 6mm-264! Low kick very flat trajectory and excellent deer/antelope killing power. </p><p></p><p> The die issue could be solved several ways. </p><p></p><p>A coordinated plan using Pacific Tool and Gauge for the reamer along with Whidden Gunworks for the FL/bushing die plus a seater would be the straightforward approach. It would cost approximately</p><p>$140 for reamer plus $270 for die set. </p><p></p><p></p><p>I have many dies on hand plus a lathe. I would order the reamer then make a forming die from an old barrel or pay PT&G $19 for a die body. I made a form die with my 6mm-284 which necks down 284 brass to 6mm wonderfully. A gunsmith could use the reamer to make the forming die.</p><p></p><p>A Redding 7 rem mag bushing/FL die can be used to size the fired brass. Just put in a smaller bushing. As for the seating I discovered that a Redding competition seating die for 284 works great for seating bullets for the 6mm-284. The body is what gets centered in these comp dies. The seater plug might have to be altered or switched out. A 7 rem mag comp seater die should work for the 6mm-264. Fortunately I have all these dies on hand. </p><p></p><p></p><p>The big hang up for me is the barrel. I have been machining Rem takeoff barrels for many of my projects. Saves a ton of money. To shoot the high BC 105 Berger requires a 1 in 8 twist. All 243 takeoffs are 1 in 9 1/4. Plus they are 24" long. There are plenty of 1 in 8 twist sporter weight barrels for sale by outfits like Bartlein but they cost over $300. Considering barrel life the rifle would have to be saved for hunting only. No load development past getting one bullet to shoot. </p><p></p><p>If you want a wildcat bad enough you do what is necessary to make it happen.</p></blockquote><p></p>
[QUOTE="AZShooter, post: 919548, member: 5219"] 6mm-284 is NOT the mach IV. Mach IV is a necked down 264 win mag! I have a 6mm-284 and am very impressed with the 105 Berger match target hybrid sent out at 3445 fps from a 28" barrel. I have actually considered making a 6mm-264. The reason is that Berger bullet. I have a magnum boltface LA rifle that has a tired 257 weatherby barrel. I could rebarrel to the 257 or make a 7 rem mag or some other hard kicking magnum but I thought wouldn't it be fun to try the 105s in a sporter weight with the 6mm-264! Low kick very flat trajectory and excellent deer/antelope killing power. The die issue could be solved several ways. A coordinated plan using Pacific Tool and Gauge for the reamer along with Whidden Gunworks for the FL/bushing die plus a seater would be the straightforward approach. It would cost approximately $140 for reamer plus $270 for die set. I have many dies on hand plus a lathe. I would order the reamer then make a forming die from an old barrel or pay PT&G $19 for a die body. I made a form die with my 6mm-284 which necks down 284 brass to 6mm wonderfully. A gunsmith could use the reamer to make the forming die. A Redding 7 rem mag bushing/FL die can be used to size the fired brass. Just put in a smaller bushing. As for the seating I discovered that a Redding competition seating die for 284 works great for seating bullets for the 6mm-284. The body is what gets centered in these comp dies. The seater plug might have to be altered or switched out. A 7 rem mag comp seater die should work for the 6mm-264. Fortunately I have all these dies on hand. The big hang up for me is the barrel. I have been machining Rem takeoff barrels for many of my projects. Saves a ton of money. To shoot the high BC 105 Berger requires a 1 in 8 twist. All 243 takeoffs are 1 in 9 1/4. Plus they are 24" long. There are plenty of 1 in 8 twist sporter weight barrels for sale by outfits like Bartlein but they cost over $300. Considering barrel life the rifle would have to be saved for hunting only. No load development past getting one bullet to shoot. If you want a wildcat bad enough you do what is necessary to make it happen. [/QUOTE]
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High velocity chamberings known for having exceptional accuracy.
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