47

[avidflyer]

Is 47 grains of varget to much? Going to work up a load for my new Fclass 308. 30 inch barrel 1/13 twist, planned on using 155 scenars, of course I'll work it up to check pressure, but see a lot of people using over 47 grains in a Lapua case...seems like a lot of powder. Looks like 3000 fps is the sweet spot. I'm sure thats a compressed load.

 

[leadbullet]

I have shot 48 gr in winchester brass though, brass is cooked in two loads. super fast and accurate too, I used that load in Fclass also with good results mid range, went with 175 SMK for long range.
cheers.

 

[Brasscow]

47 is too much, but I doubt you'll have any problems other than premature case failure. You should get 6-10 loadings at 47 before your primer pockets are too loose that you risk etching your bolt face.

It is a compressed load, long drop tubes are your friend. You should not need 47 grains to get you to 3000 in a 30" 1/13. In all likelihood you're going to have a node around 46 and another around 47.4.

 

[308sako]

If you are using a well built rifle and you work up slow, you mightbe able to get to 47.8 grains. When I did so I found that around 47.0 grains pressures appeared higher than at the ultimate load for my rifle which was 47.7 grains (velocity of 2980 ft/secs) 26.5" Rock Creek 5R. I surmise, or guess that it is the higher powder density at the maximum charge that allows a more progressive ignition.

Now a serious caveat: I believe that because of your barrel length you will see increased signs of apparent over pressure because of dwell time, not because of higher pressures. Brass life will indeed be shortened by that.

 

[M14 Shooter]

I use 46.5 Grains with Lapua Brass and CCI BR-2 Primers.This is using Nosler 155 Grain Bullet.Works great for me at 1000 yards.I would start at 45.5 and work up.

Regards,Mike