Had my 7Mag. 700 BDL rebarreled to a Bartlien 3B 24'' 8/twist, gun shoots great. I am developing my hunting load for it. 175 Elite Hunter. I am using 2X fired Hornady brass and 2X fired Peterson, the brass has never been co-mingled. It is cleaned, annealed, sized and trimmed all exactly the same, same powder, same primer, same seating depth, after three consecutive days of shooting 6 rounds from each I now have 18 rounds fired from each. Both are equally accurate close to .5moa. Here's the difference the Peterson is consistently shooting 60-70 fps faster. I am using a Garmin, both casings are shooting an acceptable SD for a hunting round being a low of 6.8 to 13.3fps, I do have to use two different neck bushings to keep tension equal on both. Can anyone tell me what's going on?
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Different brass - different velocities
- Thread starter Lefty57
- Start date
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lancetkenyon
Well-Known Member
Peterson brass is thicker, meaning less case capacity.
Less case capacity w. same powder charge = more pressure = more velocity.
Also, WAY higher quality and consistency with the Peterson.
You should not mix brass brands.
Less case capacity w. same powder charge = more pressure = more velocity.
Also, WAY higher quality and consistency with the Peterson.
You should not mix brass brands.
MagnumManiac
Well-Known Member
^^^^^THIS^^^^^
Cheers.
EDIT TO ADD:
My custom 264WM has almost 100fps difference if I use Norma brass against identical charges in Winchester brass, the difference between R-P Remington to Winchester is about 15fps to the Winchester.
Cheers.
EDIT TO ADD:
My custom 264WM has almost 100fps difference if I use Norma brass against identical charges in Winchester brass, the difference between R-P Remington to Winchester is about 15fps to the Winchester.
