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Joined: Mar 2006
Posts: 20,893
Campfire Ranger
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Campfire Ranger
Joined: Mar 2006
Posts: 20,893 |
Never owned one, but seeing 3300 fps from a 140 gr bullet from a 280AI would have me on red alert.... Yeah, I would depart the scene for sure, hurriedly.
"I never thought I'd live to see the day that a U.S. president would raise an army to invade his own country."
Robert E. Lee
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Joined: Apr 2009
Posts: 2,386
Campfire Regular
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Campfire Regular
Joined: Apr 2009
Posts: 2,386 |
My Kimber 280 Ackley tends to show pressure signs a couple grains BEFORE I reach Nosler book max loads with Ballistic Tips. My max load for the 162 A-max is 59 grains of 7828 for 3020 fps.
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Joined: Apr 2009
Posts: 2,386
Campfire Regular
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Campfire Regular
Joined: Apr 2009
Posts: 2,386 |
I personally believe anything over 3200 with 140's is over pressure, and those that claim 3300 and above are living on borrowed time,the 280AI is a great cartridge but some expect it to be more than it safely can be! Here, here... I've been using a load that dogzapper suggested in my Ackley lately which is 60 grs of IMR-4831 with 140 gr Nosler BT's. Very, very accurte with no "traditional" warning signs. 59 grains of IMR 4831 with a 140 BT gives me sticky bolt lift.
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Joined: Mar 2015
Posts: 179
Campfire Member
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Campfire Member
Joined: Mar 2015
Posts: 179 |
If I ever build one, it's gonna get a steady diet of the 150 NBT with enough powder to get it to 3,000 fps. I'll stop there and try to go fill an ark...
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Joined: May 2005
Posts: 7,081
Campfire Tracker
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Campfire Tracker
Joined: May 2005
Posts: 7,081 |
If I ever build one, it's gonna get a steady diet of the 150 NBT with enough powder to get it to 3,000 fps. I'll stop there and try to go fill an ark... Rel 17 or 22 will get you there. 57gn Rel 17 gets me 3020 with a singlr digit E. 62gn of Rel 22 delivers a bit more with 3076fps and around 14fps spread. This load shoots around .75MOA in my 22" barrel. John
When truth is ignored, it does not change an untruth from remaining a lie.
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Joined: Jan 2010
Posts: 7,996
Campfire Outfitter
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Campfire Outfitter
Joined: Jan 2010
Posts: 7,996 |
65.0 RL22
CCI. BR2 or GM210
140 ttsx
Or same with 145 LRX but 63.0 grains
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Joined: Sep 2011
Posts: 2,651
Campfire Regular
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Campfire Regular
Joined: Sep 2011
Posts: 2,651 |
Anyone else using 145LRX? Have great accuracy with 4350 and the 150TTSX, wouldn't mind getting it a little faster and sleeker with the 145 though
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Joined: Oct 2014
Posts: 80
Campfire Greenhorn
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Campfire Greenhorn
Joined: Oct 2014
Posts: 80 |
I run IMR4831 with Sierra 140 SP Gameking and see pressure signs at 3170 from 23" Obermeyer 5R barrel. Boots run his 7mm tight at .274 but says the 5R design helps with pressure. Best accuracy I get is 57 grains of IMR 4831 @ 3080 into one ragged hole. I am not trying to beat or replicate the 7mm Rem mag. I am just trying to squeeze as much juice as safely as I can in a standard long action and bolt face. I hate belted magnums and midgets magnums and have had many and sent them away. Some say a regular .270 can push 140 up to 3000 fps and .280 rem up to 3100 FPS too when loaded to .270 pressures. From "my experiences" i find that accuracy drops when you push 140 grain .270 to more than 2900 and the .280 Rem to more than 3000. Most Accuracy nodes i find for the .270 win with 140 and a .280 140 rem is around 2800. In "my" .280 Ackley I can push to 3100 piece of cake with great accuracy of the low side of pubished data and have room to spare. If I squeeze it more I can push to 3180 fine but accuracy drops. So for me, 200 extra fps from standard .280 Rem with a more accurate load, more cartridges in the chamber, brass life and cool factor is what cuts the .280 Ackley for me. Not that a deer or even myself will see the difference 200 fps can make, but its there to brag, lmfao. Dont need a magnum to kill deer and the .270 is gay (fire suit on)
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Joined: Jan 2006
Posts: 18,453
Campfire Ranger
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Campfire Ranger
Joined: Jan 2006
Posts: 18,453 |
65.0 RL22
CCI. BR2 or GM210
140 ttsx
Or same with 145 LRX but 63.0 grains I didn't even know you could fit 65 grs of powder in the Ackley. And yes, I own one myself.
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Joined: Oct 2014
Posts: 80
Campfire Greenhorn
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Campfire Greenhorn
Joined: Oct 2014
Posts: 80 |
65.0 RL22
CCI. BR2 or GM210
140 ttsx
Or same with 145 LRX but 63.0 grains I didn't even know you could fit 65 grs of powder in the Ackley. And yes, I own one myself. I can only stuff 63 and it is really compressed.
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Joined: Jan 2006
Posts: 18,453
Campfire Ranger
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Campfire Ranger
Joined: Jan 2006
Posts: 18,453 |
Maybe they are using a coffee grinder to turn stick powder into ball powder.....
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Joined: Jun 2001
Posts: 7,003
Campfire Tracker
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Campfire Tracker
Joined: Jun 2001
Posts: 7,003 |
My .280 Imp. is the RCBS version, a ballistic twin to the AI.
My hunting load is 62.0 gr. of RL22 behind a 140 gr. Nosler Accubond bullet, which gives me 3180 fps and good accuracy out of my 23.5" barreled Ruger No. 1.
There's not a whole lotta room for more of this powder!
I'd rather be a free man in my grave, than living as a puppet or a slave....
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Joined: Oct 2014
Posts: 80
Campfire Greenhorn
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Campfire Greenhorn
Joined: Oct 2014
Posts: 80 |
My .280 Imp. is the RCBS version, a ballistic twin to the AI.
My hunting load is 62.0 gr. of RL22 behind a 140 gr. Nosler Accubond bullet, which gives me 3180 fps and good accuracy out of my 23.5" barreled Ruger No. 1.
There's not a whole lotta room for more of this powder! Bighorn, how you like that Rel22? I have not tried reloder22 or magpro yet.
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Joined: Feb 2004
Posts: 17,108
Campfire Ranger
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Campfire Ranger
Joined: Feb 2004
Posts: 17,108 |
Using R22 64 grains and 140 grain BT in Nosler brass and WLR primer at 3390 from 26" tube. Hart Barrel Interesting...a 280AI juggernauting 140's at STW and Mashburn velocities;and from the same length barrel that Nosler says gives,at best,100 fps less velocity. And people wonder why I think 280AI users are the biggest wishful thinkers on the planet,and greatest purveyors of dis-informatiion. Any fool can keep adding a double based propellant like R22 until the chronograph screams,just to make a cartridge look good. That's as humerous as quoting Quick Loads as evidence of pressure in your rifle....another joke of the uninitiated.  My thoughts too. In the 3300's with 140's sounds on the very, very high end to me. I'm not sure I'd take that QL 65k as gospel.
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Joined: Feb 2004
Posts: 17,108
Campfire Ranger
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Campfire Ranger
Joined: Feb 2004
Posts: 17,108 |
Ok, didn't know the thread was this old. Read up to Bob's post and quoted feeling the loads I was reading about above it were too, too hot.
Looks like it was sorted out reasonably.
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Joined: Jun 2001
Posts: 7,003
Campfire Tracker
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Campfire Tracker
Joined: Jun 2001
Posts: 7,003 |
My .280 Imp. is the RCBS version, a ballistic twin to the AI.
My hunting load is 62.0 gr. of RL22 behind a 140 gr. Nosler Accubond bullet, which gives me 3180 fps and good accuracy out of my 23.5" barreled Ruger No. 1.
There's not a whole lotta room for more of this powder! Bighorn, how you like that Rel22? I have not tried reloder22 or magpro yet. RL22 is the only powder I have ever tried with full power loads in this rifle, and I am happy with the results.
I'd rather be a free man in my grave, than living as a puppet or a slave....
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Joined: Oct 2014
Posts: 80
Campfire Greenhorn
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Campfire Greenhorn
Joined: Oct 2014
Posts: 80 |
Bighorn I will have to go hunt down a tub myself.
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Joined: Mar 2015
Posts: 437
Campfire Member
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Campfire Member
Joined: Mar 2015
Posts: 437 |
I shoot 62 grains of Rel 22 pushing a 140 grain Nosler Ballistic Tip. Great accuracy, but not quite as much velocity out my Kimber Montana.
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Joined: Dec 2005
Posts: 2,343
Campfire Regular
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Campfire Regular
Joined: Dec 2005
Posts: 2,343 |
Bumping this because I have a new Forbes 280AI heading this way. Hoping to run 145 LRX's or similar. 9.5 twist
Anyone have any updates they'd like to add?
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Joined: Mar 2004
Posts: 6,065
Campfire Tracker
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Campfire Tracker
Joined: Mar 2004
Posts: 6,065 |
Forbes are good...:)
If you haven't already, buy Nosler's manual. They have a lab...and they actually shoot the cartridge...:)
The Nosler loads I have shot in a RI 280AI (SAAMI) are right on the money--I subtract 50fps for their 26" barrel data in my 24" Ackleys. The RL 19 load is matched with a grain less. My guess is the snug chamber. The ULA I had back some time ago also had a snug chamber. There wasn't manual then per se, but it would not digest loads that had gone thru two other AIs that I had.
Not trying to draw a parallel betwixt Melvin's rifles, but assuming it is probably made just as well and any rifle can be different in regard to the same load.
The Nosler manual loads worked up with a chronograph, give better guidance than any one else loads, experience or opinion.
fwiw...
added: powder-wise, mine have done well with stuff on the slower side. currently runnning MRP, but not married to it. RL 23 looks interesting...
Last edited by tomk; 01/11/17.
Defend the Constitution
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