Custom Rifle Help: 7mm Cartridge Decision and BDL choice

[RH300UM]

Not sure if the 9 twist is going to work with the 195

 

[Elk Hunter 338]

1.-build a 7mag!
2.-have it chambered and throated correctly for the 180 vld eldx or other high BC 180- offering they'll reach 3k pretty easily.
3.- run a standard mag box even with them being extremely long.
4.-get Hawkins BDL and follower.
5.-shoot the hell out of it!!

 

[Canhunter35]

I just had a 7rm built and throated for 180s. Pretty wicked combo. So that's what I'd recommend.
Use the bottom metal the stock is inletted for

 

[Orange Dust]

With the Wyatts cut you could build either an STW or 28 Nosler. They are the same animal in different clothes. STW requires longer OAL and brass is cheaper. It has a belt that is somehow out of style these days. The 28 has a shorter, fatter more expensive case that is all the rage today. After having two STW's, I just had a 28 built. Why? no valid reason other than I wanted to try and play with something new. I came within a knat's hair of doing a 7MM-300Win. Kinda wish I had.

 

[comen]

I just purchased a sweet little custom setup and need some help figuring out what 7mm/.284 cartridge I want to chamber my rifle in and what bottom metal to do.

Specs:
Action: BigHorn SR3 Long Action Magnum BF. Wyatts cut
Stock: Manners EH1 inlet for Bartlein 3B contour, Hawkins BDL cutout
Barrel: .284/7mm Bartlein 3B 1:9 twist 26in
Trigger: most likely trigger tech
Bottom metal: ???
Caliber: ???

I need help on a light weight bottom metal that will work (EH1 stock has hawkins BDL cutout) and figuring out what to chamber the barrel in. I don't have any 7mm reloading equipment so I will be getting dies and all that jazz.

Use: I will be using this rifle for pretty much any size of game from pronghorn to elk. And want the to be confident with an ethical kill out to 1000yards *obviously requires some serious practice so realistically 700-800yrds*
(Since it is the SR3 action I hope to, sometime at a later date, get another barrel in 30cal such as 300PRC to swap in and out but that isn't a priority right now.)

Options: 7mm rem mag, 28 Nosler, etc... Also could sell the contoured barrel blank and do a 6.5 PRC or similar. But for now focus on .284/7mm magnum cartridges.

I like the 7mm-300 win/or the practical , which should handle 180 Bergers with a 9 twist. I shoot 195s with an 8 twist, and can usually get 1/2 MOA at 800 yds, occasiopnally much better.

 

[TwoMore]

View attachment 142447

HMMM , all my boxes of 195's say 1:8 on them but I know 1:8.5 will stabilize them that is what my rogue is

 

[RH300UM]

HMMM , all my boxes of 195's say 1:8 on them but I know 1:8.5 will stabilize them that is what my rogue is

 

[WahooYahoo]

1st congratulations on what will be a nice rig.
I am super partial to the 28 caliber. My personal choice was the 7 Rem Mag and I have no regrets. It's very shootable and will do what you're asking it to; however, you already have a Wyatt's box and you're asking to kill elk at a grand. Not that the 7RM won't do it but a bit more hp might be appreciated out there. If you're a reloader, there are a few I'd look at and a few of avoid.
Consider the 7 Sherman and 7 Practical (7-300 as it was intended). Nathan Foster actually prefers the 9 twist in the Practical.
I would avoid the nosler. It's a bruiser, hell on barrels, the cost of its "extra" performance is not worth it. 25% increase in powder, 30%increase in recoil for 7% increase in velocity and 1/5th the barrel life...

https://www.ballisticstudies.com/Knowledgebase/7mm+Practical.html

Note to Nosler fanatics: it's not personal, just factual data.

Also note: Nathan was not testing with 195 EOL, although I'm sure he since has. If the 195 is the projectile of choice I would choose a 1:8.5 or 1:8 for stability

 

[crystalgayleguy]

7mm stw

 

[lancetkenyon]

View attachment 142503

There is a difference between OPTIMAL, and MINIMUM twist requirements. Berger's marketing figured they could sell to more people if they put the MINIMUM twist requirement on the box now, instead of the OPTIMAL twist rate like they used to print.



Choose a 7-08 pushing the 195 @ 2650fps, 1000' AMSL & 30°F, coastal WA OR, or some low elevation desert winter hunts.

1:9" twist is barely stable at 1.21


Just by going to a 1:8" twist, you are now fully stable @ 1.53.

 

[archeratlrg]

It's a bit retro but does anything the 28 Nosler or 7mm-300 will do. It's called the 7mm Mashburn Super and it's a hell of a round.

 

[IanCo]

I just finished a 7 Dakota last year and hoping my brass lasts as long as my barrel does. When it is time to re-barrel I will be going with another 7 that has cheaper and more available brass.

Right now I would say in this order.
7 STW
7 Practical
7 Weatherby mag
7/300 Weatherby mag
and possibly 28 Nosler...

 

[Jud96]

My 3 choices would be the 7mm SAUM, 7mm Rem Mag, and 28 Nosler. All three are popular with multiple sources for brass, and dies and reamers don't have to be special or custom ordered. With a 9 twist, I would go with either Hornady 162 ELDs or Berger 175 Elite Hunters.

 

[JJMoody]

Practicality be darned; built a 7 Chey-Tac!!