Reloading 7PRC

[cast10K]

No pressure with the below powders. First time doing the painless load dev method. Notice a hiccup with 65.5 of H1000, not sure what happened there obviously I need to be more attentive at the table.

For those curious:
22” proof suppressed with 180 rounds on barrel.
180 ELD
ADG brass second firing
Fed215

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This squares with what I'm getting with 68.0g H1000, 180 hybrid, ADG, Win LRM, 3.375" OAL, 21" barrel + Dominus, 2847fps at 110 rounds.

 

[BossGobbler2024]

24" 2875, not pushing them but accuracy is on. That is more than enough for anything to 600 yards with gas.

That is moving for a 190 gr bullet for sure. Thank you for the info.

 

[DEW0341]

This squares with what I'm getting with 68.0g H1000, 180 hybrid, ADG, Win LRM, 3.375" OAL, 21" barrel + Dominus, 2847fps at 110 rounds.

The numbers circled in the pic are book max charge. I ended up seeing pressure 2 grains over max with H1000 and 4831sc. Pressure with staball HD .5 over hodgdon website max going 2900Fps


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[Medicwp]

Have any of you tried the Staball HD with the Hornady 175?

 

[BossGobbler2024]

Have any of you tried the Staball HD with the Hornady 175?

I haven't but I saw on youtube Ultimate Reloader that he did

Forster Ultra Dies, StaBALL HD and the 7mm PRC – Ultimate Reloader

ultimatereloader.com

 

[cast10K]

The numbers circled in the pic are book max charge. I ended up seeing pressure 2 grains over max with H1000 and 4831sc. Pressure with staball HD .5 over hodgdon website max going 2900Fps


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I wasn't able to find published data for that powder and bullet combo. Where did you find that?

 

[BossGobbler2024]

Anybody seeing accuracy issues switching between lead and solid copper without cleaning first? I've been hearing rumors that makes a difference.

I had not heard that. Is it a thing?

 

[Jason Snyder]

I had not heard that. Is it a thing?

Iv’e heard it but I haven’t been able to document the difference.

 

[DEW0341]

I wasn't able to find published data for that powder and bullet combo. Where did you find that?

It’s in the Hornady manual for 180 ELDm

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[Jhoman]

I'm working on loads for my Bergara Premier HMR Pro in 7PRC, 24" barrel.

Hornady 180gr ELDM.
Peterson Brass
CCI 250
64gr H4831SC
COAL 3.350
2860 FPS
.494 group @ 100 yds

My next load that I have not shot.

Berger 184gr hybrid target
Peterson brass
CCI 250
68.7gr VV 565
COAL 3.407

 

[BossGobbler2024]

For those of you using bushings to size your brass in 7mm PRC Hornady dies, what size (s) do you find work the best?

 

[cast10K]

It’s in the Hornady manual for 180 ELDm

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It’s in the Hornady manual for 180 ELDm

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I used that same data to extrapolate for the bergers, but not all 180's are created equal. The ELDM has a lot more bearing surface generates higher pressure with equal charges. There is data for some other cartridges with both bullets and the Berger routinely has a higher max charge.

 

[cast10K]

For those of you using bushings to size your brass in 7mm PRC Hornady dies, what size (s) do you find work the best?

With ADG brass my loaded necks are .314. Using a .312 bushing.

 

[BossGobbler2024]

Thank you. Hmmm, I should have mentioned that I am using Peterson brass.

 

[Jhoman]

Using Peterson brass & Berger 184 Hyb Targets, 310 bushing with loaded necks @ .3125, Redding dies

 

[686]

Ruger American Go Wild 24”

Reloaded Hornady brass

175 ELDX 68.4gr RL25 (book max)
2855
2884
2889
2852
2881
2899
2896
2860

Average = 2877 fps (less than book velocity, which is 3000 for this recipe)

I don’t know if this barrel is just slow or what, but the accuracy is consistently just sub-MOA. This was at 200 yards:

 

[Jhoman]

184gr Berger Hybrid Target
68.7gr VV N565
CCI 250
Peterson Brass
Neck Bushing 311
.015 off the lands
18 shot string
2970 FPS Avg
STD 10.5

 

[Runolfson]

184gr Berger Hybrid Target
68.7gr VV N565
CCI 250
Peterson Brass
Neck Bushing 311
.015 off the lands
18 shot string
2970 FPS Avg
STD 10.5

What length barrel?

 

[Jhoman]

24" Bergara HMR Premier with EC Tuner Break

 

[maugh]

Has anyone tried Ramshot Grand? Hodgdon has it listed as the fastest powder for the 168 LRX.