What has been your highest velocity precision node with this cartridge launching 175 EH or 180 Hybrids?
7 PRC Users, need a little info
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crashlanding
Well-Known Member
I'm forming some adg brass using some imr 4831so not pushing it, I don't have the exact load data in front of me. Using the Berger 180 hybrid out of a 22" barrel, I'm north of 2800 fps with .5, 5 shot groups. Once this brass has 1 load behind it, Winchester stabal has worked well in this rifle and I intend to start pushing it harder hopefully getting up to 2900 fps, with that I'd be happy
Staball HD?
I am having a reamer made. I don't have any 7 PRC brass to make a dummy with the 175 dummy to send them. Is there anyone out there who has a 7 PRC using 175 or 180 where the bullet is seated with the boat tail junction is above the shoulder, with the olive at touch? How long is the freebore? I guess I can calculate where that is based on the bullet dimensions from Berger, if there are no inputs on my question.
Phil Rizzo
Well-Known Member
Around 3030 with R26 and 2970 with H1000. 175 EH
What reamer? Where is the boat tail junction? CBTO? COAL?
N570 in my last build 7 RM, I am getting close to your RL26 load, around 3050 through 26 inch Rock Creek
Phil Rizzo
Well-Known Member
I'm at 24" there,, 1-8" Bartlein .max was around 40fps higher with both powders.
LPR reamer, would handle a 195 Berger with no problem. Long throat.
I used about half the neck to grip the bullet.
Can't recall specific measurements though I'm in a combine.
LPR reamer, would handle a 195 Berger with no problem. Long throat.
I used about half the neck to grip the bullet.
Can't recall specific measurements though I'm in a combine.
Phil Rizzo
Well-Known Member
My double based powder days are unwinding!
My CBTO with the 175 EH is 2.678 which gives me a jump of .007
With 68.0 of H1000 I'm at 2930 velocity.
Even though my loading and shooting skills are very modest it's holding right at .5 moa out to 700 yes which is the farthest that I have tried yet.
I tried up to 69.5 grains but was losing accuracy.
24" Bartlien with 8 twist.
With 68.0 of H1000 I'm at 2930 velocity.
Even though my loading and shooting skills are very modest it's holding right at .5 moa out to 700 yes which is the farthest that I have tried yet.
I tried up to 69.5 grains but was losing accuracy.
24" Bartlien with 8 twist.
I think my smith said PTG but I could be mistaken
.My boattail taper is above the top of the case shoulder but I have never measured the neck grip.
SAAMI Reamer?
