7-08 velocity

[whycanti]

I am curious what velocity yall are getting with your 7-08 with heavy bullets. Please tell what bullets you are using.

 

[7mmRM]

162 AMAX @ 2725. 22" tube.

 

[Onemoretime]

162 AMAX @ 2725. 22" tube.

Are you using RL-17?

 

[mdesign]

^^ same here using 40.3gr XBR8208

 

[turbo54]

Savage model 10, 26" CBI barrel:

Before melonite: 46gr H4350, 162 amax @ 2.825" COAL, FC 308 brass-->708...2805fps Very compressed charge, case capacity limited

After melonite: 45.4gr H4350, 162 amax @ 2.825" COAL, FC 308 brass-->708...2785fps Compressed but not as much, pressure limited

 

[fred3]

150 etips at 2890 21" barrel with h4350

 

[mwroseberry]

2780fps. 162bthp running 47.2g H4350 at 2.910oal no pressure signs

 

[7mmRM]

Are you using RL-17?

48grns of H4350

 

[mark5pt56]

Savage model 10, 26" CBI barrel:

Before melonite: 46gr H4350, 162 amax @ 2.825" COAL, FC 308 brass-->708...2805fps Very compressed charge, case capacity limited

After melonite: 45.4gr H4350, 162 amax @ 2.825" COAL, FC 308 brass-->708...2785fps Compressed but not as much, pressure limited

Thought there was a velocity increase after melonite?

 

[turbo54]

Thought there was a velocity increase after melonite?

Not in this case.

You pays yo money and you takes yo chances.

 

[BoilerUP]

Would a 20" 7-08 be able to push a 175gr SMK to 2600fps?

 

[turbo54]

Would a 20" 7-08 be able to push a 175gr SMK to 2600fps?

Probably. That would be roughly equivalent to the same rifle achieving ~2700fps from a 162, which is likely.

Question is, would the 175@2600 outperform a 162@2700? Run the numbers. I think you'll see it won't until you're way way out there.

 

[DrewinTejas]

162 Amax - 2780fps

45.5 Gr H4350 loaded to 2.875 No pressure signes

 

[Onemoretime]

48grns of H4350

WOW.... how much room is left in there? Isn't that fairly compressed?

 

[7mmRM]

WOW.... how much room is left in there? Isn't that fairly compressed?

It's fairly compressed. Keep in mind my OAL is 2.91.

 

[turbo54]

Can anyone provide throat erosion vs. round count figures for 7-08?

 

[Onemoretime]

It's fairly compressed. Keep in mind my OAL is 2.91.

That's what I was thinking... longer OAL. Thanks.

 

[Captramrod01]

24" Brux barrel, 162 BTHP, 46.3gr H4350, 2780 fps.

 

[Stewart]

25" Benchmark barrel, 162 AMAX, 42gr Varget, 2780 fps.

 

[Weaselthis]

Brux 26". 162g Amax or BTHP (I use both). 46.5g H-4350. 2.955 OAL. 2790fps ave. for 10 shot group. ES 26
.5MOA load in my stick.

Shameless plug: Stick built by Spartan Rifles on a Stiller Predator action.
Marc is a friend! lol

 

[7mmRM]

Can anyone provide throat erosion vs. round count figures for 7-08?

I've nearly 4500 through mine. Gone from ~2.88 to 2.91" . And I'm a little short at that. Bbl still shoots ok. Got a reamer on the way that will start a 162 @ 2.87"

 

[scudzuki]

Up until recently I had decided that when I rebarrel my 700 action I was gonna go with .260 Remington.

Then I saw the external ballistics on the 7-08, and it is very impressive.

How's the 7-08 recoil, compared to .308 Winchester and .260 Remington?

Joe

 

[turbo54]

Up until recently I had decided that when I rebarrel my 700 action I was gonna go with .260 Remington.

Then I saw the external ballistics on the 7-08, and it is very impressive.

How's the 7-08 recoil, compared to .308 Winchester and .260 Remington?

Joe

Long range 7-08 loads with heavy bullets are on par with, or slightly heavier than 308 for recoil. 260 has substantially less.

 

[j-dubya]

Does anyone have powder suggestions for the Berger 180gr hybrid? 4350 still a top choice for a 26" barrel?

 

[turbo54]

Does anyone have powder suggestions for the Berger 180gr hybrid? 4350 still a top choice for a 26" barrel?

I'd expect H4350 to be near perfect for a 180 in 708. Maybe some RL17, to get smore bang because you'll be hurting for case capacity with that bullet.

That said, run some numbers in JBM. You'll find the ~160s are better suited to the small furnace of the 708.

 

[Hennig]

48grns of H4350

Lawdy. I loaded up some today at 2.935" COAL, and even 47 was getting pretty crunchy. Slightly flattened primers, nothing too scary.

Didnt have my chrony on me, so Ill report back once I get some velocity readings.

 

[6.5BR]

Brass brand matters, inc. capacity/pressure...just want folks to work up to the loads they see here for their rifles, and brass....for safety.

 

[HodgdonExtreme]

A drop tube also makes a big difference.

 

[jordan0317]

162 amax, 2.84 COAL, win brass, cci 200, 45.9gn H4350------ 2760fps
shot out of a 27" 1-8.7 twist Hawk Hill Customs barrel