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
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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.
fseaman.js
Well-Known Member
Winner, winner, chicken dinner.
Jakeweb09
Well-Known Member
Lance nailed it. Pick one and stick to it, and I'd recommend the Peterson by a landslide
Nice job on the reloading! Great choice in a barrel, I am sold on Bartlien gain twist barrels, every one of mine have performed exceptionally well.
med358-boise
Well-Known Member
Just as an aside, across 3 different calibers, Hornady has had the worst weight consistency of any brass I have ever used. Like ~9% and as much as 7% in what Hornady sold as match brass. When I called Hornady, they said it was due to the varying density of the brass in the web of the case. I don't know whether or not I buy that.
This! I have three .300 WMs; they all use the same brand, but I do not mix them.
Very common. Hornady brass metal make up is different then peterson. When I induction anneal lapau vs hornady there is a huge time difference. I don't feel the hornady is bad brass at all, I mean it shoots very well, low sd, consistent etc. It's just different. Like others have said, especially Lance, don't mix brass brands unless you have loads sorted out that work with either...... rare.
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Pick a quality brand, and separate all the cases by .5 grain max for empty, clean case weighs. Ex: 230.0 to 230.4 in one box or bag; 230.5 to 230.9 in another box or bag . Do this separation by weight just once and don't mix cases of different weights. Don't mix brands , and strive for cases to be as clean and as perfect and as uniform as possible. Thats my starting point . If that's too much, work then just separate 12 rounds in to a specific weight range and with carefully made hand loads, shoot 4 groups of three. Measure against shooting cases with varying case weights . You ,may like the results.
Not sure if you are aware but case weight is a waste of time. You need case volume via h2O. Often case weight is a difference in the head area and have almost zero effect on the load performance. I've played this game too and twice I've experimented with the process and came up with the same answer....... case weight within the same brass lot or brand is a waste of time.
Sdvldog1371
Well-Known Member
I personally will not buy most things Hornady. Maybe bullets here and there, but that's it. I've written their trash off. They sell trash under a once decent name. Use that Hornaday brass to break in the barrel, but toss it afterward. That's what I do anymore.
I've fought with their dies, their presses, their brass, their comparators, their bullet, and case colators, and they never accept that they put out trash product that take "fine tuning" by the end user just to be serviceable.
I've fought with their dies, their presses, their brass, their comparators, their bullet, and case colators, and they never accept that they put out trash product that take "fine tuning" by the end user just to be serviceable.
Weigh some fired and not re-sized/de-primed cases from each brand. Find 2-3 Hornady cases that weigh the same as each other. Find 2-3 Peterson cases that weigh the same.
Fill the cases with water to the case-mouth and weigh them again.
Subtract the empty weight from the full weight. That's the water-capacity of Fire-Formed brass in your chamber.
It's nearly guaranteed that whichever of the 2 has the lowest water capacity, also has the higher velocity. If that's NOT the case, check your trim length as you might be driving the neck into the lead.
Rflshootr
Well-Known Member
I don't buy it, or any brass for that matter that says Hornady.
