Home Forums Reloading Big Game Rifles 7-08 how fast?

How fast do you like to push 140's out of a 7-08? My 2 books show low 2800s. Anyone getting them closer to 3000 with good accuracy? These are C&C bullets, not monos.

2800 is a sane level.

2850 with H4350. Have some Ramshot Big Game to try which is supposed to give it a boost flirting with 3000fps.

You can't get enough 4350 in a case before its to full to get past 2850, Win 760 will get you 2950 with a 140.
I found that out about 20 years ago when hornandy came out with the light magnum stuff and claimed 3000 with a 139 so I bought a box and sure enough so I pulled a bullet and low and behold there was ball powder in the case so I bought some Win 760 and got really close to 3,000 fps.with Nosler 140 Part.in a factory Rem 700 24" barrel

2850-2900 fps is reasonable from a 22" barrel.

Yep. I get right at 2,700fps with 140's, H4350, and a factory 18.5" barrel. Somewhere near 2,800 is what I'd expect from a 22" barrel with that powder. Some of the newer offerings like RL17 or STABALL might indeed bump it up to that 2,850-2,900 range that some mention.

I've cracked 2900fps with RL-17 and IMR4007 in a 23in bbl, but never 3000fps. It would be interesting to hear from someone who's worked with STABALL 6.5 in the 7-08.

My barrel is 24 and right now I'm playing with I4350. What made me ask is I have 2 sources, Lyman #5 and the Hodgdons website. Hodgdon's says 46.5 max for I4350, but the Lyman lists 48 as max. I'm working up slowly but at 46.5 I'm at about 2770. I think another grain and a half would be too much, but I want to go till I get pressure. .2 gr at a time now.

Just checked my data, 48 gr H4350, win case, rem 9 1/2 primer. 139 grain hornady soft point flat base. 24” barrel, 2850 FPS.

Stop at 2,900fps from a 22”. Only a few powders can safely get there.

Many powders can reach 2,800fps.

I’ve shot whitetails with both 2,800 and 2,900 muzzle velocities; they all fell over.

With Big Game I get over 2900 with a 24" barrel. CFE223 I get 2880 same rifle. Bullet for both loads 140 NAB,

48grs H4350 and 140 Accubonds are 2780-2790fps from my two 22” barreled guns.

140's stop at 2,900 from a 22". Only a few powders get there.

This dude fell today from my wife's 7-08 at 12 yards. Her MV is 2,670.

2880 with Big Game and 140 Partitions. Max charge per Nosler and a magnum primer.

Kills everything you point it at.




P

H4350, RL15, Varget and Big Game will you in the 2800s out of a 22" bbl with 140 cup cores.

Big Game works great under 139gr GMXs mono.

Timely thread. Model 7, 18.5". Using IMR-4350 behind 140 gr Partition. 2.800". RP brass, 9.5s. Started 45 gr 2410 fps, 46 gr 2480 fps, 47 gr 2520 fps. All accurate, no pressure indications.

Next test 47.5 gr, 48 gr, and a 47 gr charge substituting WLR for the 9.5. Hoping to match Winchester and Hornady factory loads that chrono 2550-2575 fps in this rifle. Rem CLs are near 2675 fps.

For many years, I used, in two different 7mm08s, what was then an under book maximum load of IMR 4064 (45.0 gr behind 140 gr Sierra SPs [Sierra Rifle Reloading Manual, 50th Anniv. Edition, listed a maximum of 45.4 gr]) for 2920 fps in one and 2960 fps in the other, both with 22 in. barrels. Both were accurate loads for those rifles.

I never had any pressure signs with either, and approaching hunting season here in south Texas, I often spent a lot of range time in 90 degree [plus] weather. I also had excellent brass life with both.

But, I no longer have any more of that particular lot of powder. And, Sierra has backed down their maximum load to a considerably lower charge for this powder. I've found another accuracy node with one of the rifles using IMR 4064, but it chronographs under 2700 fps.

I'm in the process now of working up loads with Big Game for each rifle. With 47.5 gr Big Game, I'm getting 2830 fps and 2880 fps in those respective rifles using 140 gr bullets. Need to fine tune for accuracy, but I think 2800 fps is reasonable.

I've got a .280 Rem if I really need 3000.

The Magic Number.




P

2850 fps with 140 grain Partitions/Accubonds in a Remington Model Seven SS with a 20” barrel.

My Tikka will do 2900 FPS with several powder the Best first RL17, PP2000MR, Hunter, and W760. All but one with 140gr Accubonds. All the

speeds are less than 2920FPS.