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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
270 Allen Mag users, got a question
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<blockquote data-quote="royinidaho" data-source="post: 255568" data-attributes="member: 2011"><p>Wildcat made the 195s. The original intent was to develop a 185 or so but Richardvseems to have not trimmed the jacket and filled it w/lead and it cam out 195. It looked so good that he gave it a go.</p><p> </p><p>However, the 3 groove Lilja fast twist was just too much for the thinner jacked, different from the Corbin jacket (I think) on the 169.5.</p><p> </p><p>At about 400 rounds down the barrel about 50% of the Lilja barrels started dusting the 195s. That was the exact point where I got them to shooting really well at about 3050 fps. What a bummer...</p><p> </p><p>I'm in the initial stages of developing a 180gr bullet for the 270 AM that will have a bc of about 0.65 or maybe a bit better. The outcome depends on die development time, whether the bullet is a good one both consistency, accuracy and terminal performance. If it works out it will be a good thing. If not, it'll be more $ down the ol' black hole.<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite11" alt=":rolleyes:" title="Roll Eyes :rolleyes:" loading="lazy" data-shortname=":rolleyes:" /></p><p> </p><p>Regareding Alliant powders, looke at the daily bulletin at 6br site. They are making some new ones, all ball and one designed for the 50 BMG. Should be interesting in these overbore rifles..</p></blockquote><p></p>
[QUOTE="royinidaho, post: 255568, member: 2011"] Wildcat made the 195s. The original intent was to develop a 185 or so but Richardvseems to have not trimmed the jacket and filled it w/lead and it cam out 195. It looked so good that he gave it a go. However, the 3 groove Lilja fast twist was just too much for the thinner jacked, different from the Corbin jacket (I think) on the 169.5. At about 400 rounds down the barrel about 50% of the Lilja barrels started dusting the 195s. That was the exact point where I got them to shooting really well at about 3050 fps. What a bummer... I'm in the initial stages of developing a 180gr bullet for the 270 AM that will have a bc of about 0.65 or maybe a bit better. The outcome depends on die development time, whether the bullet is a good one both consistency, accuracy and terminal performance. If it works out it will be a good thing. If not, it'll be more $ down the ol' black hole.:rolleyes: Regareding Alliant powders, looke at the daily bulletin at 6br site. They are making some new ones, all ball and one designed for the 50 BMG. Should be interesting in these overbore rifles.. [/QUOTE]
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