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Not a big diff, but Nosler shows the 7mm 140AB as .485

I notice a diff in recoil from 7/08, 260, and 243 and owned many in each fwiw.

If I need a bigger 'WALLOP' in a short action on an '08 case than a 6.5/7mm version, then I will jump over the 30 and get a 338 bore for greater frontal area.

That said, I think for paper thru deer, the 243 is proven, and if going for game thru elk, would rather run a 260 or 7/08 myself, just personal choice. No doubt 308s work, but in my book, they'll kick more...and have an inferior trajectory.

All will work when proper bullets hit and destroy vitals, regardless of headstamp. Since I enjoy burning some rounds downrange to practice/learn, I like to use the least recoiling round that gives solid killing effectiveness and good trajectory - for the job at hand.




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and that is why I shoot a 260 remington

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Coyote Hunter, try those calcs with bullets having .600 or better BC's in .264 and .308, and see what the difference is.....



A wise man is frequently humbled.

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Originally Posted by 65BR
Not a big diff, but Nosler shows the 7mm 140AB as .485

...


I used the number on the midwayusa.com web site. Just confirmed it is listed as .488. Should have used the Nosler web site.

Fortunately the difference at 600 yards is only .2" drop, 6fps, 5fpe and .2" drift - all insignificant enough I won't go back and change the original post. The MPBR zero and range don't change at all.


Coyote Hunter - NRA Patriot Life, NRA Whittington Center Life, GOA, DAD - and I VOTE!

No, I'm not a Ruger bigot - just an unabashed fan of their revolvers, M77's and #1's.

A good .30-06 is a 99% solution.
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Originally Posted by smokepole
Coyote Hunter, try those calcs with bullets having .600 or better BC's in .264 and .308, and see what the difference is.....


While I don�t know of any bullets with a .600 BC that I would actually use while hunting, I would and do use 6.5mm 130g Scirocco II�s and since Scirocco II�s are available in .308�/180g as well, I use those for the calculations.

Once again using Nosler velocities and powder charges but with Scirocco II bullets (should be close enough for demonstration purposes):

.264�/130g Scirocco II, 2847fps, 43.5g powder, SD = .266, BC = .571
.308�/180g Scirocco II, 2638fps, 42.5g powder, SD = .271, BC = .520

Calculated Recoil
=================
12.60 fp = .264�/130g
17.35 fp = .308�/180g

Zero/Maximum Point Blank Range (6� diameter target)
==========================================
246 yds/290 yds= .264�/130g
226 yds/266 yds= .308�/180g

300 yard ballistics (10mph crosswind, Point Blank v1.8a)
==========================================
-3.90�, 2396fps, 1657fpe, 4.98� drift = .264�/130g
-6.54�, 2167fps, 1878fpe, 6.23� drift = .308�/180g


600 yard ballistics (10mph crosswind, Point Blank v1.8a)
==========================================
-61.69�, 1989fps, 1142fpe, 22.07� drift = .264�/130g
-79.19�, 1749fps, 1223fpe, 27.50� drift = .308�/180g

1000 yard ballistics (10mph crosswind, Point Blank v1.8a)
==========================================
-270.02�, 1520fps, 667fpe, 69.44� drift = .264�/130g
-349.23�, 1300fps, 675fpe, 88.82� drift = .308�/180g


1800fps retained velocity
===================
750 yards = .264�/130g
560 yards = .308�/180g


Significantly lower recoil and better ballistics than the .308 Win out to 1000 yards, including more than enough of the right stuff for the vast majority of hunting needs? The .260 Rem looks pretty good to me - guess that's why I built a .6.5-06AI on my non-magnum Interarms Mark X long action. Had it been a shorty a .260 Rem would have been my choice.


Coyote Hunter - NRA Patriot Life, NRA Whittington Center Life, GOA, DAD - and I VOTE!

No, I'm not a Ruger bigot - just an unabashed fan of their revolvers, M77's and #1's.

A good .30-06 is a 99% solution.
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Last edited by RO2RMT; 04/02/12.
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Administrator - DELETE this 1 post troll directly above posting garbage please!


CH _ no doubt the .485 7mm AB is not far off....and fwiw, if I still ran 7/08s, it's all I'd want in a bullet at this performance level. I am very happy w/my 260/130 combo wink

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I've said this before and i'm saying it again......i can't understand why the 260 Rem isn't more popular!!!!!

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Originally Posted by 65BR
What will a 7/08 do, that a 260/120 Barnes won't do - on elk?


Dunno - Never had a 7mm-'08, but I used a .260 140 gr. factory Corelokt on my Colorado elk at @ 150 yards. Bang-flop. (similar results on a 200 yard caribou earlier, and a 40 yard wolf later)

Brought the rifle (Rem 725 SA)up to Kotz about a week ago for tundra-range caribou - checked sighting today. 3 shots newly purchased factory Rem Corelokts printed a nice 1" triangle at 200 yards, while sitting in the snow, using the snowmachine seat for a rest, 4 inches high and 2.5 left.. (My limited number of neck-sized handloads, same bullet and weight, print an inch higher vertically and dead on horizontally, but larger groups- gotta work on that...)

I'll be using the factory loads for now.

I cranked that poor beat-up 30 year old Leupold VariX 2-7 right 3 clicks back at home. And I'm gonna leave it right there I think, if 3 shots at 300 yards tomorrow for performance check works out horizontaly...

Them beasties are in big trouble...

But I gotta say- I was ripped off. $35/box at Walmart, Fred Meyers, and Sportsmans Warehouse in both Soldotna and Anchorage for either .260 or 7mm-08, while .243, .270, '06, etc are going for 10 bucks less. Even 300 WBY Mag is cheaper! WTF????

But I need the brass anyway for reloading...this will bring me up to an even 100 rounds of brass.

Fug the big-box stores... once I get the reloads worked up to match or exceed the factory loads.

But it's nice to know that in a pinch, factory loads work quite well, if overly expensive! smile

If I play around enough, I might even get those purpoted "accurate" 120 ballistic tips to shoot as well or better than the 140's. But from all indications so far,... not.

I might even try those Barnes 120's.... expensive as they are. I like the 120 concept - but so far, the gun seems to like the 140's....

Arguing with realistic mechanics is like arguing with the wife....

Well, no - they are 180 opposite - but the end result comes up the same... smile


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'Yes Dear' is the magic phrase - Lol.

Don't be afraid to try the 120 Tsx/TTSX as they have a very good reputation for accuracy....and killing. They will be longer as you know than a cup/core 120.

No doubt, 6.5s have been strutting their stuff a long time when used properly.

Often the 7mm and 30s overshadow in popularity in the US, perhaps the old 'bigger is better' still at play wink

As always, Shot Placement is your Best Friend wink


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