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Here are the targets that he sent me. The 120 gr load lists 3150 fps over the chrono!

This man was the 5th ranking Br. competitor (for score).

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Originally Posted by Daveh
Guys- two things.
Most manuals are soft on the loads for 284 and a 284 case is within a few grains of a 280Rem capacity, basically the same.
So do you think a 7-08 is within 100fps of a 280Rem?


This is what I was thinking....
I'm no expert by any means, I'm just going by what my manuals say and word of mouth...
Seems to me there is much more than 100fps between the 2, especially in the higher bullet weights...
To me this is a lot when we're talking about a short action, no magnum comparison...

My manuals list a top load in 7-08 with a 139 with H4350 at 2906fps with 55,721PSI..
Same manual lists top lod with .284 with a 139 with RL19 at 3075 at 53,500PSI...

With a 160 in 7-08 I've got 2684 with H414 at 58,185PSI...
With a 160 in .284 I've got 2888 with RL19 at 54,600PSI...

Like I said, I'm just asking questions as well but would love to hear someone who has chronied both the 7-08 and .284....


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Greg-what were you using to measure your pressures?

Thx

Mark D


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Ya know, everyone touts bullet drop. Frankly who cares about bullet drop? Thats so easily overcome correctly and easily.

Wind drift is another issue, I"m good at high BC numbers in 223 wind drift. Not good at anything else. Generally though you boot the same bullet 200 FPS faster, its a fairly significant wind drift number in my mind, especially further out. Wind is the iffy factor, not drop, IMHO.

I'm really rolling towards 284 now, the AI round almost had my vote but recent discussions and reading, especially that feeding can be overcome(I saw a few XC rapid fire bolt guns in 6.5x284 some years back-- but they were barrel burners-- but it tells me feeding can be handled...)

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I'm really sold on the 284 case, so much so in fact I prefer that case over the short mags. One more in the belly and a slimmer stock to boot.




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Mark, Those pressures are out of a load book, probably Alliant although I can't be sure but that's the way I read his post.


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Greg,
Meant to add I have not chrono'd the 7-08 but will and have chrono'd the 284. For mine, max was
120BT's at 3200
139's at 3000
150's at 2900

The 150's were of interest to me but sold it prior to further investigation.

Dave


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GregW Offline OP
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Originally Posted by Mark R Dobrenski
Greg-what were you using to measure your pressures?

Thx

Mark D


Hey Mark...
They were out of a Lee reloading manual published in '04...

However, consulting Hodgdon's website I'm getting the exact same loads and velocities for each caliber but the pressures are in CUP...

Not sure on the conversions on these FWIW...

Figure I'd quote the pressures along with the velocites.... grin



Last edited by Gmoney; 04/19/07.

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This thread really makes me miss the two .284's (1- Ruger Tang safety 1-Browning Micro-Medallion) I traded off.

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This thread makes me very happy that Rackmaster decided to sell his .284 Model 70! Monashee


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Haha...this thead makes me miss that damn gun........

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A few random 284 thoughts..........

Mine is on a slimmed Ti action with a Wyatts box @ 2.975" Barrel is 21" Kreiger FW. The rifle weighs well under 6 lbs depending on the scope set up etc. Velocities top out comfortably in the 2935 fps range with various 139-140 gr bullets. FWIW.....I got well over that velocity but backed off because I just couldn't find a consensus of data that indicated that I should be getting any more than the range that I settled upon. My experience so far is that the 284 case is exceptionally strong and that it probably has the potential for equal velocities and greater case life than an improved case off of the .308 family. I have also owned a fair group of 7-08's and I'm of the mind that the average velocity difference is more or less maybe roughly 120-150 fps or so give or take a touch.

Who dat say who dat when I say who dat??.......... confused

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GregW Offline OP
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Originally Posted by JimF


Who dat say who dat when I say who dat??.......... confused

JimF


You had me till here....grin....


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Originally Posted by Gmoney
Originally Posted by JimF


Who dat say who dat when I say who dat??.......... confused

JimF


You had me till here....grin....


Yeah, just when you thought he knew what he was talking about. whistle

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Hey!!

I knew lotsa stuff about lotsa stuff.........once.

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JimF- Glad to see you're still around!

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Who dat got dat .284 Winchesta?

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Approximate H2O capacities of the 7mm-08 and .284 with a 140 spitzer seated (measured with fired brass I have on hand):

7mm-08; 49 grains
.284: 61 grains
.280: 63 grains

According to the 1/4 rule, this means about a 6% velocity gain possible from the .284, in the same barrel length at the same pressure. If the 7mm-08 is capable of 2900 with a 140 (which is what I've found with those I've owned), then the .284 can get around 3075.

The 7mm-08 AI will be in between, but closer to the 7mm-08. I have only fooled with one, a rifle built but Kenny Jarrett. He sent along some of his handloads and they were SCARY, over 3200 with 140's. Kenny likes to step on the accelerator some.

Oddly enough, I have seen more feeding problems with 7-08 AI's than .284's, maybe because the .284's shoulder is 35 degrees, not 40 as in the AI. This should be that much difference, and maybe my experience was mere chance.

JB


Last edited by Mule Deer; 04/21/07.

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Mule Deer,
How close would the 284 case necked up to 30 cal be in case capacity to the venerable '06? Hmmm....

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Originally Posted by Huntr
Mule Deer,
How close would the 284 case necked up to 30 cal be in case capacity to the venerable '06? Hmmm....


I think he already answered that with the 284/280 comparison. It seems like a pretty interesting answer too....... grin

At one time recently I was considering a 30/350 RM (Cuz I have a 600 Magnum action rolling around on the floor)If that action were a std bolt face, I'd be thinkin' about a 30/284 myownself.

JimF

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