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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
What is the most overbore cartridge YOU HAVE USED?
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<blockquote data-quote="Jeff Heeg osoh" data-source="post: 3074859" data-attributes="member: 111250"><p>I had a slightly shortened 50 cal with a radius shoulder necked down to a 375 that held 25 grains more powder than a 416 Barrett. It was easy to push a 400 grain 3480 fps with H50 BMG. ** First barrel made it through load development only and was done.</p><p></p><p>Then the second barrel made it - 10 rounds in Colorado and 35 rounds at the KO2M, we did load development based off the widest window in bullet jump with the least fps spread and ran with it. The barrel was history after the 45 rounds through it even though we switched powders and was using US869 because the small ball material powder was less abrasive to the throat versus cylindrical design of the H50 BMG. The rifle preformed very well and made it to the finale that year. </p><p>The rifle was a tack driving laser if one was messing around at a ELR range and taking their time, but if forced to shoot a dozen rounds fast at multiple target as the timer was counting down you were combining a cutting torch and a sand blaster all in one.</p><p></p><p>Never wanted the title or bragging rights but this had to be the King of the barrel burners.</p><p></p><p></p><p>Just a note - 2 of us were running these and in time we opened the brass up to a 416 re-chambered barrels to the same chamber just in a 416 now versus the 375 and have been pushing the 550s at 3060 with ease using 20N29 and the barrel/throat has been holding up well.</p><p></p><p>Cheers</p><p>Osoh</p><p>JH</p></blockquote><p></p>
[QUOTE="Jeff Heeg osoh, post: 3074859, member: 111250"] I had a slightly shortened 50 cal with a radius shoulder necked down to a 375 that held 25 grains more powder than a 416 Barrett. It was easy to push a 400 grain 3480 fps with H50 BMG. ** First barrel made it through load development only and was done. Then the second barrel made it - 10 rounds in Colorado and 35 rounds at the KO2M, we did load development based off the widest window in bullet jump with the least fps spread and ran with it. The barrel was history after the 45 rounds through it even though we switched powders and was using US869 because the small ball material powder was less abrasive to the throat versus cylindrical design of the H50 BMG. The rifle preformed very well and made it to the finale that year. The rifle was a tack driving laser if one was messing around at a ELR range and taking their time, but if forced to shoot a dozen rounds fast at multiple target as the timer was counting down you were combining a cutting torch and a sand blaster all in one. Never wanted the title or bragging rights but this had to be the King of the barrel burners. Just a note - 2 of us were running these and in time we opened the brass up to a 416 re-chambered barrels to the same chamber just in a 416 now versus the 375 and have been pushing the 550s at 3060 with ease using 20N29 and the barrel/throat has been holding up well. Cheers Osoh JH [/QUOTE]
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What is the most overbore cartridge YOU HAVE USED?
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