Forums46
Topics538,381
Posts9,736,477
Members87,084
|
Most Online25,604 Feb 12th, 2024
|
|
|
Load Dev / Ladder Test Question
#6382695
07/26/16 01:58 AM
|
Joined: May 2010
Posts: 4,073
RedSnake
OP
Extreme Tracker
|
OP
Extreme Tracker
Joined: May 2010
Posts: 4,073 |
Is it preferable to do load dev with unfired or once-fired brass?
|
|
|
Re: Load Dev / Ladder Test Question
[Re: RedSnake]
#6382793
07/26/16 03:15 AM
|
Joined: Sep 2009
Posts: 18,960
ChadTRG42
THF Celebrity
|
THF Celebrity
Joined: Sep 2009
Posts: 18,960 |
I do it on new brass, and then confirm the same load works on fired brass once it's sized. If your sizing (case body and neck tension) is different than the new brass, then you can get a slight change in the load.
|
|
|
Re: Load Dev / Ladder Test Question
[Re: RedSnake]
#6382830
07/26/16 03:55 AM
|
Joined: May 2014
Posts: 1,100
TackDriver
Pro Tracker
|
Pro Tracker
Joined: May 2014
Posts: 1,100 |
I had made some good groupings with new brass on the 6.5 Creedmore, and next time out with neck sized brass of the same loads shot differently. I believe its the volume of the full sized case is smaller than the volume of the neck sized brass resulting in that variation.
If you full size new brass and fired brass, it may not change so much. Neck size is what changes.
Last edited by Big Stan; 07/26/16 03:57 AM.
|
|
|
Re: Load Dev / Ladder Test Question
[Re: RedSnake]
#6382923
07/26/16 11:34 AM
|
Joined: Apr 2010
Posts: 6,219
dee
THF Trophy Hunter
|
THF Trophy Hunter
Joined: Apr 2010
Posts: 6,219 |
I tend to take new brass and load it then neck size the next 2 firings. After that I start bumping shoulders and I have never seen a difference in the load.
"A vote is like a rifle; it's usefulness depends on the character of the user" Theodore Roosevelt
|
|
|
Re: Load Dev / Ladder Test Question
[Re: RedSnake]
#6383362
07/26/16 05:56 PM
|
Joined: Dec 2008
Posts: 41,217
J.G.
THF Celebrity
|
THF Celebrity
Joined: Dec 2008
Posts: 41,217 |
Depends on how much brass you have for the rifle. When I got into 6.5 CM business I ladder tested, and group shot on virgin brass, because I started with 500 pieces. Once they were all shot once I stuck with the same load, never retested, and didn't notice a change.
But if you have 100 pieces of brass for a rifle, it's not too far down the road that you've shot them all once. After a .002" bump there's be nothing wrong with testing groups within the node again, but I wouldnt re-ladder test.
800 Yard Steel Range Precision Rifle Instruction Memberships and Classes Available
|
|
|
Moderated by bigbob_ftw, CCBIRDDOGMAN, Chickenman, Derek, DeRico, Duck_Hunter, hetman, jeh7mmmag, JustWingem, kmon11, kry226, kwrhuntinglab, Payne, pertnear, rifleman, sig226fan (Rguns.com), Superduty, TreeBass, txcornhusker
|