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Notes on the Centenerian
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<blockquote data-quote="nicholasjohn" data-source="post: 1635398" data-attributes="member: 109113"><p>They used to speak of getting better velocity when there is <em>"more time under the pressure curve." </em> I haven't heard much about that concept in the last few years. I think I first heard that expression when Federal was loading a line of ammunition called High Energy, which is no longer available. I was using their 30-06 load, with the 180-grain Nosler Partition. It got EXACTLY the velocity they advertised, which was 2880 fps. It also shot three shot groups with all the holes touching, and I killed a bunch of animals with that load. Wish I had bought a case of it. I have no idea what the powder was, or whether or not there was a fancy loading technique involved - they just shot great and killed well.</p><p></p><p>More recently, I've used the Hornady Superformance ammo in the same rifle. I haven't chronographed it to check velocity, but they do fly the trajectory that Hornady says they do. I have to think that the velocity is about as advertised, which is faster than standard. They also kill extremely well, with the 165-grain GMX bullet. I've shot several animals with this bullet, and it knocks them down handily, without a lot of blood-shot meat. Accuracy, though, was a bit erratic - a couple of boxes shot half-inch groups; a couple shot <em>PATTERNS.</em> ( All had the same lot number on the box flap.) Hornady never answered my email when I asked about it, which surprised me a bit.</p><p></p><p>I'm using a different rifle this season ( it's a .280 ) and I plan to load one of the monolithic bullets. I may try Hodgdon's Superformance powder, and see if I get the higher velocities, or I may just stick with one of their conventional powders ( 4350 or 4831.) I haven't heard whether or not the Superformance is a temperature-sensitive powder. That will be the deciding factor for me. Has anybody got anything to say about that ?</p></blockquote><p></p>
[QUOTE="nicholasjohn, post: 1635398, member: 109113"] They used to speak of getting better velocity when there is [I]"more time under the pressure curve." [/I] I haven't heard much about that concept in the last few years. I think I first heard that expression when Federal was loading a line of ammunition called High Energy, which is no longer available. I was using their 30-06 load, with the 180-grain Nosler Partition. It got EXACTLY the velocity they advertised, which was 2880 fps. It also shot three shot groups with all the holes touching, and I killed a bunch of animals with that load. Wish I had bought a case of it. I have no idea what the powder was, or whether or not there was a fancy loading technique involved - they just shot great and killed well. More recently, I've used the Hornady Superformance ammo in the same rifle. I haven't chronographed it to check velocity, but they do fly the trajectory that Hornady says they do. I have to think that the velocity is about as advertised, which is faster than standard. They also kill extremely well, with the 165-grain GMX bullet. I've shot several animals with this bullet, and it knocks them down handily, without a lot of blood-shot meat. Accuracy, though, was a bit erratic - a couple of boxes shot half-inch groups; a couple shot [I]PATTERNS.[/I] ( All had the same lot number on the box flap.) Hornady never answered my email when I asked about it, which surprised me a bit. I'm using a different rifle this season ( it's a .280 ) and I plan to load one of the monolithic bullets. I may try Hodgdon's Superformance powder, and see if I get the higher velocities, or I may just stick with one of their conventional powders ( 4350 or 4831.) I haven't heard whether or not the Superformance is a temperature-sensitive powder. That will be the deciding factor for me. Has anybody got anything to say about that ? [/QUOTE]
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