7mm rem mag

1899 said:
Steyr-Mannlicher uses a 1:8.6 twist and mine shoots 150 Partitions in 1/2" at 100 and 175 Partitions into even smaller groups.


Jordan - where does Berger talk about the 195? I haven't seen much on it outside of the Long Range Hunting forum - and there, according to Bryan Litz, the +1.6" long 195gr will need at least a 1:8.5 twist. I suspect it will depend on barrel length too, and on whether a fellow is using it for hunting or target shooting.
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Eric Stecker, Bob Beck, and Bryan Litz have all contributed to various threads on the LRH forum, and comments were made regarding the Miller stability formula showing that a 9" twist will stabilize the 195 most of the time, unless you're at sea level in dry, cold conditions. I can't remember if it was Bryan or Eric, but one of them agreed that 8.5" is only going to be necessary in the worst conditions, but since they have to cover their bases, 8.5" is the minimum recommended twist. If throating a barrel for the 195, I'd go 8" twist, since you never know what super bullet might come out next, and a little reserve twist is never a bad thing.
 
Jordan - I just went onto Berger's twist calculator, and using 20 degrees celcius at 2000' and 2800fps, you get a stability factor of 1.41 (1:9 twist), which is listed as "marginal". My friend just recieved his Krieger 1:8.5 twist 7mm barrel. Perhaps I can report back on progress in the spring time (if the bullet is available).
 
Of course all this is theoretical at this point, and real world data will become available as the bullet comes into production, but just for reference, anything between 1.4-2.0 is considered well-stabilized. Anything between 1.0-1.4 is marginally stable, and anything under 1.0 is unstable.

I have a few of loads that work out to somewhere in the 1.0-1.2 range that are stable and very accurate out to 1100+ yards. FWIW...
 
There is a reason it is the most popular light magnum made...

Reasonable recoil, flat shooting, enough for anything in North America...
 
Jordan Smith said:
Of course all this is theoretical at this point, and real world data will become available as the bullet comes into production, but just for reference, anything between 1.4-2.0 is considered well-stabilized. Anything between 1.0-1.4 is marginally stable, and anything under 1.0 is unstable.

I have a few of loads that work out to somewhere in the 1.0-1.2 range that are stable and very accurate out to 1100+ yards. FWIW...
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The problem with marginally stabilized bullets is yaw draw which can drop a bullet's BC by 20%, not accuracy.
You can have a bullet that never goes to sleep, so you'll get the ballistics of a 0.400 G1 BC bullet instead of a stabilized 0.500 G1 BC ballistics but accuracy might still be excellent.

Alex
 
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If that were the case, you'd notice it at ranges beyond 500 yards, and I just don't notice any difference in trajectory, wind drift, or accuracy between these loads and others that are well-stabilized, even out to beyond 1100 yards...
 
My ''go to gun'' Bang flop on anything I have taken, moose, deer, want an elk, bear, shot placement on deer is important cause bone shots waste a lot of meat. With practice the reach out and touch factor is rewarding--2-3-4 hundred yds
[QU OTE=coyote1664;8026353]I am not overly concerned about recoil, have shot some big bores. I think of it more as massage therapy. @ pilot dc,I do like how flat shooting the round is, and the thought crossed my mind about maybe being light for large moose, but everything comes down to shot placement.[/QUOTE]
 
Jordan Smith said:
Long story short- I'd be watching for a Rem 700 XCR, Ruger Hawkeye, or Win 70 EW in 7RM, and I'd run the 140gr TTSX at 3300fps for normal hunting ranges, and then the 162gr A-Max or 168 or 180gr VLD for practice out to as far as you care to shoot.
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This right here is great advice....Although, I prefer the 120 TSX at 3450fps and the 162 amax at 2970fps out of my 24" Montana 7wsm's.....
 
For 25 years or so I've used a 1953 vintage .270 but it was getting a bit shot out for the long shots so the natural choice for a replacement was the 7mm mag. My freezer hasn't been empty before or since I made the move up.
 
7mm Rem Mag is a great caliber, my favourite. Got rid of 2 but I still have these 3. Browning Long Range Hunter, Sako AV and a Rem Model 7 in 7mm SAUM. As far as game, I mostly use them for Moose, I find it a bit too much for Deer.
 
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Yep, agreed the 7mm will do the job nicely.
I got either side a 270 win an a 300wsm... an if i had to could easily Trade both on a single 7 ....if i had too.
Luckily i dont , but im shooting light projies in that ShortMag so would proberly prefer a 7.
darn well wanted a SA rifle tho didn i...
 
I do not reload so what would be a good factory round to run with? Barrel will have a 1 in 9.5 twist. i have looked at the federal premium line and I do not know a whole lot on bthp vs tsx vs ect.. Any info/recommendations thanks again!
 
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