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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Re-Barreling a Factory .300 RUM
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<blockquote data-quote="AZShooter" data-source="post: 1333215" data-attributes="member: 5219"><p>I have been handloading since 1983. Back in the pre VLD days we seated hunting bullets to fit and feed from unaltered magazines. All my friends and I found accurate loads simply by trying different bullets and or powders till something worked. We factory rifles with SAMMI spec chambers and made the best loads we could.</p><p></p><p>Only those crazy bench rest guys fooled with bullets seated close or into the lands. They even were so bold as to use "custom" reamers made to their specifications! My how things have changed.</p><p></p><p>When the VLDs showed on the scene the BR and Long Range target shooters used them first. They kept using their custom reamers and discovered that VLDs shot the best kissing or in some instances many thousandths into the lands. This knowledge trickled down through a few magazines like Precision Shooting and even made it to Shooting Times with Rick Jamison talking about altering seating depth! Rick's article those many years ago sure shook up my handloading friends and me. Imagine altering the seating depth as the final accuracy tuning of a rifle!!! We figured he had too much time on his hands..... Then the internet with its many forums spread this information everywhere.</p><p></p><p>I tried many VLDs and only a very few shot well. My 257 Weatherby which uses a custom reamer with .100" jump to lands is the only chambering that works well with VLDs. In fact 7 rifles used that reamer and ALL shot bugholes . Several years later Berger finally discussed how to get the VLDs to shoot.</p><p><a href="http://www.bergerbullets.com/vld-making-shoot/" target="_blank">http://www.bergerbullets.com/vld-making-shoot/</a></p><p></p><p>Many years later Berger began making Hybrid bullets and finally we don't have to play this crazy precise distance to lands game anymore.</p><p></p><p>I have loaded for 5 300 Remington Ultra Mags and ALL responded with excellent accuracy with the use of the 230 gr Match target hybrid with seating depths that fit and feed from the magazine.</p><p></p><p>Berger says you don't have to worry about seating depth with hybrid bullets. It is true. I have loaded quite a few Berger hybrids in many calibers and none required any more effort than seating to fit and feed from the magazine and working up a powder charge.</p><p></p><p></p><p>Six 7 Rem mags 168 and 180 hybrids</p><p>Five 300 RUMs 230 hybrid</p><p>Two 6mm BR 105 hybrid</p><p>Two 338 RCMs 300 gr Berger hybrid</p><p>One 6mm-284 105 hybrid used as a repeater with .160" jump to lands</p><p>Two 6mm-284 with 95 grain classic hunter hybrids</p><p>One 300 WSM with a jump over .200" to lands</p><p>One 300 RUM and the 215 hybrid</p><p>One 308 and 215 hybrid</p><p></p><p>Have a gunsmith install your barrel chambered with a SAMMI 300 win mag reamer and try one of the many 30 cal hybrids. You won't have to deal with the frustrating details of precise seating depth. Heck don't even worry about finding out the distance to the lands. It is like going back in history to an easier loading regime.</p></blockquote><p></p>
[QUOTE="AZShooter, post: 1333215, member: 5219"] I have been handloading since 1983. Back in the pre VLD days we seated hunting bullets to fit and feed from unaltered magazines. All my friends and I found accurate loads simply by trying different bullets and or powders till something worked. We factory rifles with SAMMI spec chambers and made the best loads we could. Only those crazy bench rest guys fooled with bullets seated close or into the lands. They even were so bold as to use "custom" reamers made to their specifications! My how things have changed. When the VLDs showed on the scene the BR and Long Range target shooters used them first. They kept using their custom reamers and discovered that VLDs shot the best kissing or in some instances many thousandths into the lands. This knowledge trickled down through a few magazines like Precision Shooting and even made it to Shooting Times with Rick Jamison talking about altering seating depth! Rick's article those many years ago sure shook up my handloading friends and me. Imagine altering the seating depth as the final accuracy tuning of a rifle!!! We figured he had too much time on his hands..... Then the internet with its many forums spread this information everywhere. I tried many VLDs and only a very few shot well. My 257 Weatherby which uses a custom reamer with .100" jump to lands is the only chambering that works well with VLDs. In fact 7 rifles used that reamer and ALL shot bugholes . Several years later Berger finally discussed how to get the VLDs to shoot. [URL]http://www.bergerbullets.com/vld-making-shoot/[/URL] Many years later Berger began making Hybrid bullets and finally we don't have to play this crazy precise distance to lands game anymore. I have loaded for 5 300 Remington Ultra Mags and ALL responded with excellent accuracy with the use of the 230 gr Match target hybrid with seating depths that fit and feed from the magazine. Berger says you don't have to worry about seating depth with hybrid bullets. It is true. I have loaded quite a few Berger hybrids in many calibers and none required any more effort than seating to fit and feed from the magazine and working up a powder charge. Six 7 Rem mags 168 and 180 hybrids Five 300 RUMs 230 hybrid Two 6mm BR 105 hybrid Two 338 RCMs 300 gr Berger hybrid One 6mm-284 105 hybrid used as a repeater with .160" jump to lands Two 6mm-284 with 95 grain classic hunter hybrids One 300 WSM with a jump over .200" to lands One 300 RUM and the 215 hybrid One 308 and 215 hybrid Have a gunsmith install your barrel chambered with a SAMMI 300 win mag reamer and try one of the many 30 cal hybrids. You won't have to deal with the frustrating details of precise seating depth. Heck don't even worry about finding out the distance to the lands. It is like going back in history to an easier loading regime. [/QUOTE]
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Re-Barreling a Factory .300 RUM
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