Help with upcoming .277 build

Here's my 270 Sherman mag with the 150gr SBD2S.
20230417_230617.jpg
Screenshot_20230421_150045_Range Buddy.jpg
 
matt_3479 said:
I've always wanted to add a .277 build to the line up. I know they aren't as popular as a 6.5, 7, and 30's but I have pretty much everything already covered. This is more because I want one!

Anyways I'm not one for huge speed demon so I'm thinking maybe the 270/6.5 prc for the purpose of Lapua brass or holding off until more brass options come out in the 7 prc and necking it down. Hoping to run the 170's, and build a real lightweight multipurpose hunting rifle from whitetail to moose. Just because I know it's coming, I already have a 300 Norma, 7 mag so the moose part is generally covered

Specs can change but thoughts are;

- falkor lw7 long action
- carbon barrel (hoping ibi drops there's soon)
- manners lrh
- Hawkins bottom metal
- tt diamond
Click to expand...
For a LA, 27 Nosler with a 7 twist. shoot a 150 SBD2 @ 3200 fps. George from Badlands Precision said 3200 was a very doable speed. Those numbers are making me consider selling my current build.
I love my 270 wsm though. But it's a SA and won't fit or spin a 170 gr EH. But it's awesome with a 130 gr.
But check out a 27 Nosler @ 3196 fps with a 150 SBD2. 👇 And that's only 3402 #'s of muzzle energy. Only 16 #'s more muzzle energy then my 7mag with a 180 vld-h starting at 2912 fps. The 27 Nosler still has plenty of energy at 1000 yards.
 

Attachments

  • Screenshot_20230728_145046_Applied Ballistics.jpg
    Screenshot_20230728_145046_Applied Ballistics.jpg
    585.8 KB · Views: 34
SSG Graybush said:
For a LA, 27 Nosler with a 7 twist. shoot a 150 SBD2 @ 3200 fps. George from Badlands Precision said 3200 was a very doable speed. Those numbers are making me consider selling my current build.
I love my 270 wsm though. But it's a SA and won't fit or spin a 170 gr EH. But it's awesome with a 130 gr.
But check out a 27 Nosler @ 3196 fps with a 150 SBD2. 👇 And that's only 3402 #'s of muzzle energy. Only 16 #'s more muzzle energy then my 7mag with a 180 vld-h starting at 2912 fps. The 27 Nosler still has plenty of energy at 1000 yards.
Click to expand...
I'm running my 27 Sherman mag at over 3500 with H1000.
 
SSG Graybush said:
Man by the time you done load development you need a new barrel. 😂
That's impressive though. 3500 fps with what weight bullet?
Click to expand...
It's with the 150gr SBD2. And that's backing down after finding pressure. It pressured out over 3600. I have another good load I found with the 160gr T-Rex also. It slowed it down to in the 3200 mark.
 
matt_3479 said:
so 6.5 prc ackley basically, necked up too 7mm then?

I am strongly considering a 6.5prc or improved necked to .277 due to the Lapua brass. I figured it would probably have the 170's at 2950-3050 was my assumption.

The only reason the 7prc necked down is in mind is the hopes better brass(Lapua fingers crossed) would give me the 3000-3050fps mark plus possibly better feeding be a true long action caliber. The brass is what's holding me back
Click to expand...
Howdy, I have been thinking about a 270/7Prc . Brass will be available soon for the 7prc , I got a notice yesterday that Adg will be available in the next 2 weeks, Peterson around the end of August.
The 7 would propel a170gr. Much more efficient than the 6.5. This might be a project for next year for me. 👍
Lapua will be bringing brass out also, they make it for 300 and 6.5
 

Similar threads

matt_3479
Help on a .277 build
Replies
7
Views
2K
highdrum
H
V
help with 26Nosler build
Replies
1
Views
702
Edd
E
E
Help with build weight
Replies
2
Views
1K
Erik Kiser
E
N
Help with new build
Replies
0
Views
926
nctta
N
M
Help with custom build!
Replies
1
Views
1K
azsugarbear
A

Recent Posts

Top