New Brass VS. Once Fired Brass Velocity

Cordell

Well-Known Member
Joined
Feb 4, 2009
Messages
203
I should know the answer to this but can not find my data.

How much of a difference will you get with new unfired brass compared to using the same brass once it has been fire formed to your chamber? All other load components are the same.

Hope this makes sense.
 

Moman

Well-Known Member
Joined
Feb 7, 2008
Messages
853
Location
Sonoma County, CA
Others will be able to answer this better than I can but I will give you a couple examples that I have had. New brass in my 308 only stretches the shoulder .002 and when I FL size it I push the shoulder back .0015 to .002 so typically I haven't seen changes in velocity. On the other hand, I have a factory 700 in 300 WM and the shoulders stretch .014 when fireforming. I also FL size this bumping the shoulder .001-.002 and if using the same recipe, the velocity really falls off due to the increased case capacity.
 

Trending threads

Recent Posts

Nightforce has great tracking capabilities, they are rugged, a bunch of elevation, holds zero forever, and reticles are designed for long range shooting. So if you are looking to shoot long distances constantly, then you need a scope that can take the abuse. -- gilmillan1


Culture Of Excellence At Nightforce Optics
By Len Backus

A high level of quality both in production and in service. Read More


Nightforce is such a solid combo of reticle, available elevation, glass that is good enough to shoot at the longest range you can dial. Nightforce has bullet proof construction that can handle the incidental horse rolling or some other rodeo action. -- bigngreen


Nightforce ATACR Scope Review
By Jeff Brozovich

The new NightForce ATACR is for sure a top choice for any long range shooter. Read More


The total package. Nightforce is the best I have used as far as turret feel and solid detents. I have never had one that didn't track right on and always return to zero. Nightforce NXS is the best value for everything I need. -- Broz


Nightforce Velocity 1000 Reticle Review
By Scott Shreve

I think Nightforce knocked it outta the park with this reticle! Read More

NightForce


Top