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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
JLK and DTAC bullet questions
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<blockquote data-quote="BryanLitz" data-source="post: 299539" data-attributes="member: 7848"><p>Gabe,</p><p>Regarding the 7mm 180's, the question's been asked a few times in the recent past. Here's a link to the prior discussion:</p><p><a href="http://www.longrangehunting.com/forums/f19/jlk-vlds-41892/" target="_blank">http://www.longrangehunting.com/forums/f19/jlk-vlds-41892/</a></p><p></p><p>Bottom line is that both bullets (Berger and JLK) are the same shape, same weight, so they have the same BC. In the case of the 7mm's, JLK's BC's are advertised as higher than actual (but still a fine bullet with a high BC).</p><p></p><p>On the other hand, JLK's 6.5mm 140 grain VLD has a surprisingly high BC, very close to advertised, which is higher than any other 140 grain class bullet in that caliber.</p><p></p><p>The BC for the .243 115 grain DTAC bullets is also over stated at .585 according to my tests of the unpointed bullets. I know that Tubbs has gone to pointing all the 115 DTAC's now, so it's possible that the new ones may be close to .585, but the old (unpointed) ones aren't. Again, a very good bullet for LR shooting, but the BC is advertised too high.</p><p></p><p>Your barrel will probably cook pretty quick if you push those 115's at high velocity. In general you can expect barrel life to improve as you move to a larger caliber for similar sized cases. Think .22-250 vs .308 Win.</p><p></p><p>Take care,</p><p>-Bryan</p></blockquote><p></p>
[QUOTE="BryanLitz, post: 299539, member: 7848"] Gabe, Regarding the 7mm 180's, the question's been asked a few times in the recent past. Here's a link to the prior discussion: [url]http://www.longrangehunting.com/forums/f19/jlk-vlds-41892/[/url] Bottom line is that both bullets (Berger and JLK) are the same shape, same weight, so they have the same BC. In the case of the 7mm's, JLK's BC's are advertised as higher than actual (but still a fine bullet with a high BC). On the other hand, JLK's 6.5mm 140 grain VLD has a surprisingly high BC, very close to advertised, which is higher than any other 140 grain class bullet in that caliber. The BC for the .243 115 grain DTAC bullets is also over stated at .585 according to my tests of the unpointed bullets. I know that Tubbs has gone to pointing all the 115 DTAC's now, so it's possible that the new ones may be close to .585, but the old (unpointed) ones aren't. Again, a very good bullet for LR shooting, but the BC is advertised too high. Your barrel will probably cook pretty quick if you push those 115's at high velocity. In general you can expect barrel life to improve as you move to a larger caliber for similar sized cases. Think .22-250 vs .308 Win. Take care, -Bryan [/QUOTE]
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JLK and DTAC bullet questions
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