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Gimme your no BS 280AI velocities

 
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  #1  
Old 11-15-2013, 08:16 PM
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Gimme your no BS 280AI velocities

I see many claims of 280AIs pushing 3000fps or more with 168's. I've run two popular powders through mine, and at max book loads I'm getting low 2800's with 168 VLDs. 24" Barrel, 9:1 twist.

H4831SC - 58.0 MAX, 2814fps

IMR 7828 - 57.2 MAX, 2832fps

While my personal deal is that I won't ever exceed book loads, it is worth noting that I worked up to these MAX loads and while I wasn't seeing screaming pressure signs, there were definitely signs relative to starting and mid range loads. Basically, I'm not buying the "book maxes are lawyer driven with a huge margin of error" arguments.

I would be interested in hearing your no BS, chrony and/or drop verified velocities in 280AI using any bullet design and weight. And if you are sporting a 38" barrel or something, or getting 2 reloads before you can fit your pinky in the primer pocket, drop that in as well
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Old 11-15-2013, 09:27 PM
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Re: Gimme your no BS 280AI velocities

I have a 26" Hart barrel 280AI. My bullet of choice that I have not ever felt compelled to deviate from is the 160 gr Accubond

I have shot it with RL22, RL25 and latest with RL17

Always use a chrony and all powders and loads were right at 3000 fps and with the RL17 a very consistent 3030 fps

Never lost a primer pocket
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Old 11-15-2013, 09:42 PM
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Re: Gimme your no BS 280AI velocities

Quote:
Originally Posted by woods View Post

I have shot it with RL22, RL25 and latest with RL17


Always use a chrony and all powders and loads were right at 3000 fps and with the RL17 a very consistent 3030 fps
Woods, can you share your load data? I don't question your results, just trying to figure out where I'm losing out on 100fps (spotting you 50fps for your extra 2" of barrel).

Thanks

Brandon
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Old 11-15-2013, 09:46 PM
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Re: Gimme your no BS 280AI velocities

Tried the same deal and only found 3k with rl17 with 168 bergers
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Old 11-15-2013, 09:52 PM
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Re: Gimme your no BS 280AI velocities

Quote:
Originally Posted by midnightmalloy View Post
Tried the same deal and only found 3k with rl17 with 168 bergers
Interesting. What else did you try and what were your velocities?
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  #6  
Old 11-15-2013, 10:01 PM
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Re: Gimme your no BS 280AI velocities

I think Wood's and I are shooting same load with R-17 but little difference in velocity with 160AB I'm getting 3046fps. Also Nosler data for max load with 160AB using IMR-7828 and I'm couple grains under max load at max velocity.

I was wonder since you mention your book loads etc where did you get that loading data from? I was looking at Bergers manual they don't have any loads for the 280AI and I know Hodgdon has some loads for the 168gr Seirra using the powders you mentioned.

I use Nosler data for my wife's 280AI with 150gr bullets and were pretty close with their data and both rifles never had a problem with primers.
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Old 11-15-2013, 10:23 PM
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Re: Gimme your no BS 280AI velocities

Quote:
Originally Posted by TOM H View Post
I was wonder since you mention your book loads etc where did you get that loading data from? I was looking at Bergers manual they don't have any loads for the 280AI and I know Hodgdon has some loads for the 168gr Seirra using the powders you mentioned.
You are right - the book loads I have are not for the Bergers. Typically I'll find similar (not exact) bullet constructions at the same weight and compare across sources to get an idea of max. Then I'll run a charge test in .5 grain increments to that Max recording velocity and any pressure signs. Here is what I used to get a feel for "book max" in 168gr target bullets using H4831. My velocities are pretty much in line with published.

Hodgdon, 168MK, 57.7gr H4831, 2779MV
Nosler, 168custom comp, 58.0 H4831SC, 2806MV
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