6.5/7 PRC Build

[260shooter]

Out of curiosity, what advantage would the 6.5/7 PRC have over a 6.5 Weatherby RPM throated like the 6.5 PRC? Based on the info I have been able to find, the 6.5 RPM has only one grain less water capacity than the 7mm PRC (81 gr vs 82).

I couldn't tell you. I have not researched the 6.5 Weatherby. Maybe ADG brass?

 

[BAKPAKR]

I couldn't tell you. I have not researched the 6.5 Weatherby. Maybe ADG brass?

Peterson brass is available for the RPM and I think that is supposed to be good brass (at least I tell myself that because I use Peterson 280 AI brass ).

 

[huntnful]

Out of a 22” 5 groove proof barrel.

 

[Treelineasassin]

What freebore is everyone using for a 156, 0.225 or so?

 

[260shooter]

The freebore in my chamber is .340 and a freebore diameter of .265.

I've just started working with the 156. will update when I have more data.

 

[huntnful]

What freebore is everyone using for a 156, 0.225 or so?

Gun smith said his freebore was .180. Here’s a 156 touching the lands

 

[khuber84]

The freebore in my chamber is .340 and a freebore diameter of .265.

I've just started working with the 156. will update when I have more data.

That's insanely deep, I love it.

 

[huntnful]

That's insanely deep, I love it.

Haha hell yeah it is! I wasn’t sure if I’d want to scream 140’s and wanted some freebore room to play with them also. But the 156’s .010 jam in a .180 freebore shot great for me.

 

[huntnful]

Got my 26" carbon benchmark sendero 1-8 twist in.

My current barrel is a 22" 1-7.5 twist proof. It's looking like it safely tops out right around 69gr. N570 at 3110FPS.

Putting the new barrel on after this aoudad hunt next month and searching for 3200+ with 156's out the 26" with less twist. I think it'll be a breeze.

 

[260shooter]

I have a 24" CF Proof 8 twist to go on when the 22" is done.

 

[huntnful]

6.5-7PRC

22” proof sendero 1-7.5 twist

156 Berger
CCI 250
68gr. N570
.010 Jam

944 yards checking BC. Used 3050fps and .34 G7 in my revics. Holding .5 MOA right for a little varying right to left breeze.

 

[260shooter]

That's outstanding!

This cartridge is uncanny in it's ability to attain great numbers.

 

[huntnful]

That's outstanding!

This cartridge is uncanny in it's ability to attain great numbers.

I'm honestly enjoying it. I could go 69gr. at 3100, but it is just the faintest hair into pressure. So I settled on 68. I kept my cases in the pickup at 70 degrees yesterday during the test as well.