Posted on 01/31/2017 7:47:11 AM PST by w1n1
Cartridge manufacturer, Hornady introduced the mission-specific 6.5mm, Creedmoor center-fire rifle cartridge in 2008. Since that time, the cartridge has become a hot commodity in the shooting range and the hunting arena. The cartridge was originally designed for competitive shooting, before hunters took notice. The hunters were drawn to the cartridge because hunting specific loads did not exist and also due to its superbly accurate performance in shooting competitions. The other factor is the affordable rates of rifles in the market.
Historically, the hitherto expensive long range, custom retargeting rifles took a price dive when Rugers released the $1,400 to $1,600 price range Precision Rifles. The price of rifles fell even further with the release of the $1,207, Savage Model 10 BA Stealth rifle. The price and accuracy factors have also seen the number of rifles chambered in 6.5 Creedmoor increase substantially. The 6.5 Creedmoor has a relatively short case with a long O.A.C.L. designed to maximize the usable powder capacity to carry heavier projectile weights. Compared to the previously popular .308 Winchester, 6.5 Creedmoor has a better Ballistic Coefficient (BC) on long range shooting.
The 6.5 Creedmoor also has less recoil and wind deflection, a feature that gives it the power to carry most of its energy to the range. This is also the reason why the cartridge is able to maintain its accuracy past the 1,200 yards. Read the rest of the 6.5 Creedmoor info here.
From the headline, I thought it was a California earthquake report. :)
Actually, no, the Grendel is not based on a 556 case at all. It has a much larger diameter case body(If I recall, based on the 220 Russian) is very short and makes up powder capacity in the diameter vice the length. The Overall length of the round is governed by how deeply you seat a long 6.5 mm bullet- some light bullets can be driven rather quickly, but any thing over 123 grain eats up capacity and thereby reduces performance, but the better drag coefficient of the long boat tail bullet makes up for some speed loss.
In the AR15 platform, the wide cartridge eats up a lot of the available barrel walls at the chamber and does the same with bolt- leaving not much metal (meat) for safety and strength.
The 6.5 Creedmoor is based n even a larger case- the 308 win/762 Nato and is much longer and greater in capacity, but is not so long in case as to require bullets to be seated deeply consuming powder capacity. It is a boutique cartridge that gets the best use of a short action bolt gun, allowing a better combination of powder capacity, bullet seating and overall length compared to chamber dimensions.
It compares a bit better in a short action to a 260 Remington, but not by much, and not if one handloads in a rifle with a specially designed chamber for the 260 ( longer throat and freebore to accommodate longer slicker heavy .264 diameter bullets). Both of these can be chambered in the Ar10 platform.
If one wants increased long range performance, the next logical step up is cartridges in the range of the 6.5/284 Win or the 6.5/30-06, or even into the wildcat range of the 6.5/7mm Win Short Mag.....
Speed costs, how fast do you want to go/how fast do you want to erode your barrel? These over bore rounds tend to eat barrels rather quickly- I know of one competitor who buys barrels in lots of five- and uses up one pre-season, two in the season and reorders at the end of the season so he has five Kriegers on hand..... ( at a cost of around $400 each...)
The trade off with the larger wildcats is recoil and blast and barrel life for speed/range.
On the other hand, a moderate load in the venerable 30/06 with a 190 BTHP at a leisurely 2650 fs will reach well past the 1k mark, and with careful development and even heftier bullets like the 210-240 grain BTHPs in faster twist barrels, will get you to 1500 yds easily...
The trade off is recoil.
That’s obscure, does anyone get it? Not many know what improved cartridges are (as in Ackley improved).
Some do! But then again, I work in the industry, so I'm around "gun people" all the time.
You done good on that one ..... brother was in need and ya hooked him up proper ....forever grateful. Will go look at yer buddies link !
Yes Sir !
Sorry
Not meaning to argumentative but 30 grains of black powder ain’t much
You must mean smokeless powder
I use 80-100 grains in all my 30-50 caliber smoke poles
Again not right in the case of 30-30
It’s smokeless powder
Hate to nit
But it is a gun thread lol
To think I avoid public ranges due to know it alls like I’m acting right
30 grains is a pistol load
Hell you can put 60 grains in a Walker if you’re man enough
God forbid the load requirements of black powder for a 00 or four gauge Howdah
The .30 Winchester Smokeless first appeared in Winchester's catalog No. 55, dated August 1895. As chambered in the Winchester Model 1894 carbine and rifle, it was also known as .30 Winchester Center Fire or .30 WCF. When the cartridge was chambered in the Marlin Model 1893 rifle, rival gunmaker Marlin used the designation .30-30 or .30-30 Smokeless. The added -30 stands for the standard load of 30 grains (1.9 g) of early smokeless powder, according to late-19th century American naming conventions for black powder-filled cartridges. Both Marlin and Union Metallic Cartridge Co. also dropped the Winchester appellation, as they did not want to put the name of rival Winchester on their products.[3]
Just saying hi
Been a while
Interesting caliber
I like it
Ammo availability
Vaporize your target a mile away. You could buy these in the 1960's.
6.5x55 is loaded to lower pressure due to all the nearly 70 uear old rifles it could be loaded in vs the brand new creedmore. if you want competition level long range performance skip the creedmore and go with the 6.5-284 Norma which has more case capacity than that 30-06 round shown in the picture any thing the 6.5 creedmore does the 6.5 Norma does better with 200fps more velocity at any bullet weight vs the creedmore. it’s like comparing the 308 vs 30.06 in case capacity. downside is the Norma is a known barrel burner one cannot shove thay much powder down a narrow bore and not get throat erosion.
Re-read what I wrote: black powder equivalent - in other words, the amount of smokeless powder equivalent to 30 grains of black powder.
No, it ain't much.
Quintessential elk cartridge.
Agree 100% .... tried this and that caliber yet always return to the “03 Improved” as you call it ..... for Elk and Mulies.
So easy to be good with the 6.5 Creedmoor. It’s almost like cheating.
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