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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
22/6mm bullets blowing up
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<blockquote data-quote="bearmn56" data-source="post: 609671" data-attributes="member: 41378"><p>Dave,</p><p> Thanks for the reply. I kind of suspected that the three groove barrel might be a problem (when I ordered the barrel from Lilja, I told him that it would be used for a 22/6mm with heavy bullets...the 3 groove is what he sent)... I can see that the forces of accelerating and spinning the bullet...as imparted through the jacket..were only divided between the three lands probably weakening the jacket at the junction of the lands/grooves. (My gunsmith recently showed me a new Broughton barrel...5 radiused lands and grooves...no sharp edges to create problems... a truly gorgeous barrel.)...By the way, in a phone conversation with Dan Lilja, he insisted that sharp edges of lands were best for accuracy...just saying what he is saying...</p><p> One other option that I have considered is to have the 22/6mm chamber cut off and have the barrel set back and rechambered to 22-250. Have a friend who has a 1-8" twist 22-250 (six lands and grooves). Claims to be getting around 3100-3200 fps with 80gr SMKs and no blowups. He also claims a rather high shot count with minimal throat erosion (this guy has everything including a bore scope!!).</p><p> The Lilja barrel was over $500.00 installed (using my JGS custom reamer with no throat...just a short leade allowing the Sierra MKs and Berger VLDs to be seated with the base of the bullet at the base of the neck). Kind of hate to change barrels again until I find a proven combination.</p><p> Thanks again,</p><p> Bearmn56 (Bill)</p><p> Montana Territory</p></blockquote><p></p>
[QUOTE="bearmn56, post: 609671, member: 41378"] Dave, Thanks for the reply. I kind of suspected that the three groove barrel might be a problem (when I ordered the barrel from Lilja, I told him that it would be used for a 22/6mm with heavy bullets...the 3 groove is what he sent)... I can see that the forces of accelerating and spinning the bullet...as imparted through the jacket..were only divided between the three lands probably weakening the jacket at the junction of the lands/grooves. (My gunsmith recently showed me a new Broughton barrel...5 radiused lands and grooves...no sharp edges to create problems... a truly gorgeous barrel.)...By the way, in a phone conversation with Dan Lilja, he insisted that sharp edges of lands were best for accuracy...just saying what he is saying... One other option that I have considered is to have the 22/6mm chamber cut off and have the barrel set back and rechambered to 22-250. Have a friend who has a 1-8" twist 22-250 (six lands and grooves). Claims to be getting around 3100-3200 fps with 80gr SMKs and no blowups. He also claims a rather high shot count with minimal throat erosion (this guy has everything including a bore scope!!). The Lilja barrel was over $500.00 installed (using my JGS custom reamer with no throat...just a short leade allowing the Sierra MKs and Berger VLDs to be seated with the base of the bullet at the base of the neck). Kind of hate to change barrels again until I find a proven combination. Thanks again, Bearmn56 (Bill) Montana Territory [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
22/6mm bullets blowing up
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