tag:blogger.com,1999:blog-8659715953846222592.post1480125333012244042..comments2023-11-03T02:59:20.738-07:00Comments on BLACKFORK: Twist Rate.Robert Langhamhttp://www.blogger.com/profile/16497658569363397644noreply@blogger.comBlogger9125tag:blogger.com,1999:blog-8659715953846222592.post-30726844311402747272008-12-10T20:59:00.000-08:002008-12-10T20:59:00.000-08:00The 77s gave me flat primers but the bullet was ja...The 77s gave me flat primers but the bullet was jammed in the lands on every one of them. Three popped out . (remind me to shake them out of the trigger.) 25 Varget. Using CCI 450 magnum primers. There's a better primer? <BR/> The Winchester SR primers that I had opportunity to check really chrono-ed well. Weighing every charge.Robert Langhamhttps://www.blogger.com/profile/16497658569363397644noreply@blogger.comtag:blogger.com,1999:blog-8659715953846222592.post-57486630621782135212008-12-09T20:44:00.000-08:002008-12-09T20:44:00.000-08:00Chris:You need to switch to small rifle magnum pri...Chris:<BR/><BR/>You need to switch to small rifle magnum primers (CCI 550). That is why you are getting inconsistent results, failure to light off all that powder (its a compressed load of varget, a stick powder). Your mileage may vary or not.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8659715953846222592.post-36328592968858503762008-12-09T17:46:00.000-08:002008-12-09T17:46:00.000-08:00That 26gr/69gr load mustv'e been cooking.I get abo...That 26gr/69gr load mustv'e been cooking.<BR/><BR/>I get about 2850fps out of my 24" 1:7, with 24.5gr of Varget under the Hornady 75gr BTHP match (Winchester brass and CCI match small rifle primers). <BR/><BR/>Even better, it'll group into under 1moa at 600 if the wind co-operates.<BR/><BR/>I can push the velocity a bit higher without pressure problems in the winter, but the load loses consistency. Also, I live in AZ, and if I go over 24.5gr, it flattens primers when it gets over 110 degrees out. <BR/><BR/>I will say however, that I've never found a more consistent powder in this heat than Varget.AnarchAngelhttps://www.blogger.com/profile/06447178964096399015noreply@blogger.comtag:blogger.com,1999:blog-8659715953846222592.post-45051030456247863062008-12-09T16:48:00.000-08:002008-12-09T16:48:00.000-08:00Had the jackets come off some 69 Noslers with 26 g...Had the jackets come off some 69 Noslers with 26 grains of Varget under them. Heard good things about the Hornady 75s. Haven't shot many. Shot almost exclusively Sierras.Robert Langhamhttps://www.blogger.com/profile/16497658569363397644noreply@blogger.comtag:blogger.com,1999:blog-8659715953846222592.post-56252772964557430942008-12-09T12:23:00.000-08:002008-12-09T12:23:00.000-08:00Robert, Mic the length on each of the bullets. Spl...Robert, <BR/><BR/>Mic the length on each of the bullets. Split the difference between the one that doesn't stabilize and the one that does, and that's probably the longest bullet you'll be able to shoot accurately from that barrel.<BR/><BR/>Remember, it's the length that's the determining factor not the weight, so two bullets of identical weights but different construction, or different profile will be of different length.<BR/><BR/>I was a 77gr SMK shooter for years, but about three years ago I switched to the 75gr hornady match. They've actually got a slightly better BC, and they'll stabilize in a 1:8 just fine (hornady says they'll stabilize in 1:9, but my math says different). <BR/><BR/>I find that the 77gr smk needs a bit more twist than other bullets of equivalent weight to stabilize. The 75gr Hornady a bit less. Funny enough those, the 69gr SMK doesn't need as much as other 69gr bullets. <BR/><BR/>Berger is the one that throws me off big time though; because the formula says one thing, and they say another (slightly slower), and they're general right about their own bullets.AnarchAngelhttps://www.blogger.com/profile/06447178964096399015noreply@blogger.comtag:blogger.com,1999:blog-8659715953846222592.post-66035395307377915802008-12-09T07:03:00.000-08:002008-12-09T07:03:00.000-08:00Yep. Never a problem wth 1/7. For a while Dougla...Yep. Never a problem wth 1/7. For a while Douglas was advertising 1/7.7 I hear. Somehow that morphed into 1/8. This is about barrel three on this rifle, and along with my other two, probably about barrel six overall. No problems until now.<BR/> Lots of success with Douglas barrels over the past few years. Won the TSRA Highpower Championship once. Louisiana State Champ twice. Distinguished. HM. Very competitive. But this Douglas barrel stinks. It's wasted a competitive shooting year.Robert Langhamhttps://www.blogger.com/profile/16497658569363397644noreply@blogger.comtag:blogger.com,1999:blog-8659715953846222592.post-81744226837849773862008-12-08T16:29:00.000-08:002008-12-08T16:29:00.000-08:00A little... ok a LOT... more detail:http://anarcha...A little... ok a LOT... more detail:<BR/><BR/>http://anarchangel.blogspot.com/2007/01/stabilization-mythology.htmlAnarchAngelhttps://www.blogger.com/profile/06447178964096399015noreply@blogger.comtag:blogger.com,1999:blog-8659715953846222592.post-8457135688096850672008-12-08T09:30:00.000-08:002008-12-08T09:30:00.000-08:00I just checked my twist rate chart. Forget the fi...I just checked my twist rate chart. Forget the first comment.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8659715953846222592.post-460810587242273212008-12-08T07:36:00.000-08:002008-12-08T07:36:00.000-08:00A novice comment .... but shouldn't the twist be f...A novice comment .... but shouldn't the twist be faster than 1:8 to stabilize 80 grain bullets?Anonymousnoreply@blogger.com