Data Request

[BBF]

Does anyone have loading data for the 308 Win using a 140 gr GCFN bullet?
I would like to get about 2000 fps.
None of my books show loads for that weight.
 
I have Unique,Trail Boss,Blue Dot, 2400, SR 4759.
 
  4198 as my fastest IMR powder.

[muznut 54]

Your IMR SR4759 is faster than the 4198 but around 22gr to 24gr of 4759 should get you there.

[stimpylu32]

Does anyone have loading data for the 308 Win using a 140 gr GCFN bullet?
I would like to get about 2000 fps.
None of my books show loads for that weight.
 
I have Unique,Trail Boss,Blue Dot, 2400, SR 4759.
 
  4198 as my fastest IMR powder.

From the RCBS Cast Bullet Manual #1
 
148g FNGC
 
IMR 4064 - 29.0 to 31.0  - 1721 to 1860 fps
 
IMR 4895 - 28.0 to 30.0  - 1760 to 1897 fps
 
SR 4759 -   21.0 to 23.0  - 1925 to 2070 fps
 
2400 -         20.0 to 22.0  - 1932 to 2091 fps
 
IMR 4227 - 20.0 to 22.0  - 1806 to 1972 fps
 
Unique -     13.0 to 15.0  - 1682 to 1826 fps
 
Red Dot -    11.0 to 13.0  - 1575 to 1716 fps
 
700X -        10.0 to 12.0  - 1542 to 1663 fps
 
These will get you in the ball park without any problems .
 
stimpy

[muznut 54]

When someone says the fastest powder they usually mean burn rate, it must have been a trick question lol.

[BBF]

Thanks guys,
Twas'nt meant to be a trick question. I did write the velocity I wanted and of course the burn rate was for the only IMR powder on the list.

Muznut see PM I sent.

[georgeinohio]

being a long time lover of cast boolits one of the most commen mistakes i see being made is getting stuck on velocity .
  start low  and work up , let the rifle show you what it wants to shoot .

what are you going to be happier with  boolits @ 1700-1800 fps that shoot 1 moa   or boolits that shoot  3 moa at 2000fps 

start low and work up , while chances are very good you will find aceptable acuracy  at the speeds you want .
you might find   a load that shoots better  be it a bit slower or faster then you want

[BBF]

George...
The velocity and the size of the meplat makes a hardcast bullet a killer or crippler. When you have something as small as a 30 cal cast bullet you need a certain amount of velocity to make it work as a hunting bullet for big game. 100 ft/sec one way  or or the other may not make a difference. In the case of that 30 cal round I don't want to go below 1800 ft/sec

[muznut 54]

Thanks for the pm BBF but as stated my new bottle of SR4759 says IMR in front of the SR4759 and the data I gave you put you where you need to be.