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200 grain 6.5 revisited (Attention Elkaholic, and Hammer)
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<blockquote data-quote="RockyMtnMT" data-source="post: 1337272" data-attributes="member: 7999"><p>I've been talking with Kirby Allen about this project. With the action that we are going to use it is not recommended to go with either the 338 Lap or 300 Norma as a parent case as they are capable of producing pressures that are higher than the action can handle. He did not recommend doing his 6.5 Allen Mag due to the lack of availability for 338 RUM brass. There is good availability of 300 and 7mm RUM brass. So with all that in mind to build a true fire breathing 6.5mm he thought that would be the way to go. We have a a reamer on the shelf for what we call the 6.5 Ultracat. It is a 300/7mm RUM with 40* Ackley shoulder. With the 6" twist barrel we will be able to design a bullet that can take advantage of the cartridge. Should be able to get better performance than we did the first time that we worked with this round. It was before we were making bullets and we just could not get a heavy enough bullet that would stabilize in the 7" twist and survive the launch. With the over bore and too light of bullet we just could not keep the consistency of the US869 to fully take advantage of it. A good load one day would lock it up the next with a 10deg rise in temp. Wound up loading it way down in order to hunt with it. We should be able to get at least 30g more bullet with a good vld design and look at launch speeds in the mid to upper 3000fps area. With the idea of a rifle that will finish in the 14-15lbs range scoped with a 31" barrel with a good brake it should have little to no recoil. Certainly will not be a high volume varmint rifle but it will be a legit 1000+</p><p>yard medium game rifle shooting on a rope.</p><p></p><p>We did two rifles in this chamber a few years ago and they were super fun to shoot. What we are looking at doing this time should solve the problems that we encountered last time. Really looking forward to this one.</p><p></p><p>Steve</p></blockquote><p></p>
[QUOTE="RockyMtnMT, post: 1337272, member: 7999"] I've been talking with Kirby Allen about this project. With the action that we are going to use it is not recommended to go with either the 338 Lap or 300 Norma as a parent case as they are capable of producing pressures that are higher than the action can handle. He did not recommend doing his 6.5 Allen Mag due to the lack of availability for 338 RUM brass. There is good availability of 300 and 7mm RUM brass. So with all that in mind to build a true fire breathing 6.5mm he thought that would be the way to go. We have a a reamer on the shelf for what we call the 6.5 Ultracat. It is a 300/7mm RUM with 40* Ackley shoulder. With the 6" twist barrel we will be able to design a bullet that can take advantage of the cartridge. Should be able to get better performance than we did the first time that we worked with this round. It was before we were making bullets and we just could not get a heavy enough bullet that would stabilize in the 7" twist and survive the launch. With the over bore and too light of bullet we just could not keep the consistency of the US869 to fully take advantage of it. A good load one day would lock it up the next with a 10deg rise in temp. Wound up loading it way down in order to hunt with it. We should be able to get at least 30g more bullet with a good vld design and look at launch speeds in the mid to upper 3000fps area. With the idea of a rifle that will finish in the 14-15lbs range scoped with a 31" barrel with a good brake it should have little to no recoil. Certainly will not be a high volume varmint rifle but it will be a legit 1000+ yard medium game rifle shooting on a rope. We did two rifles in this chamber a few years ago and they were super fun to shoot. What we are looking at doing this time should solve the problems that we encountered last time. Really looking forward to this one. Steve [/QUOTE]
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200 grain 6.5 revisited (Attention Elkaholic, and Hammer)
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