Advice Please!

[farmer7]

Hello,

I have a 100 Lapua .308 cases (once fired, but not from this rifle) which I have run through a redding body die and then neck sized. Can I work up a load from here or will I get different results on the next loading (after fireforming in my chamber).

I dont need maximum case space with the charge range I'm using with N140, so case capacity isn't a concern. But I just cant figure out if pressures will be different after forming on the second loading or on the first loading will the pressure be the same as it will form to the same size ultimately. Does peak pressure happen before the case is fully formed or after?

Do I have to form them before load development?

I hope this makes sense!

 

[wilecoyote]

assuming that are correctly and "all-the-same" resized,
load your resized Lapuas following your handl.manual instructions,
stay away from the full max. if you're keeping the bullet closer to the lands more than SAAMI specs.,
fireform these 100 without fear, if you're a fireforming fan,
and enjoy your rifle and the resulting targets_
in my opinion, the load developement start w.the first shot,
go up in batches of five with 3 tenth of grain increments any batch,
stop if/when you read some overpressure sign_
(unlikely the max.charge would give you the best benefits,anyway)
if not all, you won't run out of 140 before ending the chase to the fireforming dream...
shoot them,stay safe and be happy!

 

[farmer7]

assuming that are correctly and "all-the-same" resized,
load your resized Lapuas following your handl.manual instructions,
stay away from the full max. if you're keeping the bullet closer to the lands more than SAAMI specs.,
fireform these 100 without fear, if you're a fireforming fan,
and enjoy your rifle and the resulting targets_
in my opinion, the load developement start w.the first shot,
go up in batches of five with 3 tenth of grain increments any batch,
stop if/when you read some overpressure sign_
(unlikely the max.charge would give you the best benefits,anyway)
if not all, you won't run out of 140 before ending the chase to the fireforming dream...
shoot them,stay safe and be happy!

Thank you wiley!

 

[wilecoyote]

Let us know the results: adding more infos (type of bullets,rifle tgts.,distance,etc.) here you'll find well more qualified members apt to better help you on the next steps, if needed_
enjoy!