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280 AI Load Data

 
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  #15  
Old 03-28-2014, 01:44 AM
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Re: 280 AI Load Data

2950-2975fps
If I try to push closer to 3000fps, the primer pockets suffer.
I usually use nosler brass, but came across a heck of a deal on 112 rounds of 280 brass for $50.
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  #16  
Old 03-28-2014, 02:07 PM
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Re: 280 AI Load Data

I have had very good results with ramshot magnum with the 160 and 168 grain bullets...it seems to be very temp resistent..
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  #17  
Old 03-28-2014, 02:33 PM
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Re: 280 AI Load Data

Good info guys keep it coming aim hoping to get the 150gr NABLR to shot well from both the kimber and the Cooper if I have to I will drop to 140gr in the Kimber as it's only for sheep anyway. I'm gona try 4831sc as Nosler calls for this in the manual as the best load for the 150s.
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  #18  
Old 03-30-2014, 12:07 AM
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Re: 280 AI Load Data

Quote:
Originally Posted by Jcub View Post
The same could be said about you.
having a longer barrel does matter.. especially when shooting slower powders.. allows more time to burn.. why do u think people use 30-32 barrels? why do u think u get more velocities with these longer barrels??? I am not calling u dumb.. I simple just think your mistaken..

kasey
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  #19  
Old 03-30-2014, 08:19 AM
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Re: 280 AI Load Data

Quote:
Originally Posted by freebird63 View Post
2950-2975fps
If I try to push closer to 3000fps, the primer pockets suffer.
I usually use nosler brass, but came across a heck of a deal on 112 rounds of 280 brass for $50.
That s exactly where I am at with H4831sc. I'm running 60gr right at 2975. If I go up a 1/2 gr the primers start to flatten and I get ejector marks.
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  #20  
Old 04-05-2014, 04:20 PM
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Re: 280 AI Load Data

I was able to shoot my Kimber Montana 280 AI with 150 GR ABLR and 60.5GR H4831SC , shot really well during barrel break in no pressure signs ,and I believe this load is going to work well , and I probably got an honest .75 or a little smaller group . I may have to tweak load some but if it will continually shoot .75 at 100yards I will probably leave at that , I think that is fair for a 6.5LB sheep rig . I will post more as I shoot , I cannot wait to try this load in my Cooper hopefully it will shoot really good with this load.
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  #21  
Old 04-05-2014, 05:44 PM
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Re: 280 AI Load Data

Quote:
Originally Posted by kaseyfied View Post
having a longer barrel does matter.. especially when shooting slower powders.. allows more time to burn.. why do u think people use 30-32 barrels? why do u think u get more velocities with these longer barrels??? I am not calling u dumb.. I simple just think your mistaken..

kasey
Acutualy thats not quite true. Having a longer barrel simply keeps the bullet exposed to the pressure for longer giving higher velocities but it makes little or no difference to the best burn rate. In terms of best velocity what you are looking for is the flattest curve at max pressureso the bullet gets max pressure for the longest time but as the pressure is rapidly dropping by the time the bullet is 5-6 inches down the barrel it will generally be the slowest powder that will fit enough in the case that gives best velocity regardless of barrel length. Check the reloading manuals, you will find the recommended burn rates in a given cal similar for both pistols and rifle. There are other considerations though such as muzzel blast which can be reduced with a faster powder. If that wasn't the case we could all chop our barrels and just use faster powders .
My favourite 280ai powders with the 160 gr class are Vit n165 and N560
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