Barrel Question

[bucksnort2]

Gents,
I currently have a model 12 benchrest rifle (.308). I'd like to convert it to a mid-range gun, using over the counter ammunition. I've been reading about the 6.5 Creedmoor. Ammo/brass are both available in local stores. If I were to replace my .308 barrel with a 6.5CM that should do the trick. I've noticed that there are some manufacturers selling 'drop-in' barrels. I'm looking for suggestions with regard to barrel length, twist, and profile. Thanks.

[LongRange]

if your going to stick to BR and or F-class id suggest a shilen select match S-8 contour or CBI match grade,26 to 30" and i think most if not all are 1-8 twist for the 6.5CM...ive had great luck with shilen at 28" but wouldnt be afraid to go CBI as their CS is top notch....Jim at NSS has both in stock i believe.

[acemisser]

mcgowin makes a **** good shooter as well..Always been my choice for new barrel..

[bucksnort2]

What does it mean when it refers to a 'standard' shank vs a 'large' shank? The rifle that I'm looking to modify is a model 12 benchrest (.308 going to a 6.5 creedmoor). Thanks.

[jpdown]

Standard shank means small shank vs large shank. Go to the Sharp Shooter Supply web site http://www.sharpshootersupply.com/ and look under tech update tab for the following information and a picture showing the difference.

"Barrel Shanks
In 2002 Savage offered rifles in the Winchester Short Magnum (WSM) and Remington Ultra Magnum (RUM) calibers. When these were finally in the catalog, there was a change made to the barrel shank diameter. Standard barrel shank diameter on standard calibers are 1.055" x 20tpi. On the new WSM, RUM, and SAUM calibers it is 1.120" x 20tpi. The barrel nut is also bigger in internal size, but is the same outer diameter and our barrel nut wrench will still fit. Savage also used this size of shank on the first version of the Model 10ML muzzleloader.
However, there were a few WSM and RUM rifles made on the standard barrel shank in the first production run. The best way to tell is to measure the barrel shank right against the nut. The larger barrel shank will have a step down approximately 1/8" ahead of the barrel nut. If your rifle has a serial number with a "G" prefix, it is most probable it will have the larger shank."

[LongRange]

also if i remember correctly the large shank barrel nut is aprox 5/8s of an inch and the small shank is aprox 7/8s of an inch thick measuring the nut from action to muzzle....5/8s is 0.6250 and i just measured a large shank factory nut and it is 0.6530.

[Jamie]

The Model 12 Benchrest is a large shank as it is built on the target action.

I have owned several McGowen and CBI barrely and all shot very well with some being exceptional. I currently have a Brux in 6x47 L and it would fall on the exceptional side. Don't know if all of them do this well but from what I read, most of them do.

[bucksnort2]

While we're talking about barrels, 6.5 Creedmoor or 6.5x47 Lapua? It will be used at 300-600 yards. Occasionally 1K. From what I've read, the 6.5x284 like to eat barrels. The 6.5 CM brass/ammo is available off the shelf. I have a Model 12 Benchrest in .308 that I would like to rebarrel. All thoughts/suggestions are appreciated.

[LoneWolf]

The Creedmoor and lapua are pretty much the same thing. Biggest factory is cost of brass. Some say the Creedmoor is better with the 140's, but the lapua may only be a few FPS slower. Also Lapua uses small rifle primers and Creedmoor uses large rifle primers.

[Ernie B]

[QUOTE=Jamie;301117]The Model 12 Benchrest is a large shank as it is built on the target action.


So, based on the statement above, does this mean my Model 12 F/TR - and ALL Savage Benchrest actions - will have large shank barrels?? I, too, am about to rebarrel my Mod. 12 F/TR and this is a question that I've been thinking about as this is my first Savage rifle. Thanks in advance for the help.

Ernie

[Newsshooter]

I believe all the target actions are large shank. If you want to use factory ammo go with the Creedmoor, much cheaper than the 6.5X47. Reloads and its a wash. Winchester is making ammo now too with the Hornady hpbt. I have a large shank 6.5x47 barrel listed in the classifieds. It was originally a 260 LRP bull barrel that was re chambered.

[noname]

not true 223 243 22-250 308 etc can be either or..I think the meaning large shank it
for long action....short is small shank...Aint sure..someone will cut in and explain it..

[LoneWolf]

The shank size refers to the diameter of the threads to match the barrel to the action. large shanks are only used on the target actions and newer WSM Models. All others are small or otherwise referred to as standard shank.

[Newsshooter]

not true 223 243 22-250 308 etc can be either or..I think the meaning large shank it
for long action....short is small shank...Aint sure..someone will cut in and explain it..

Nope, large shank and small shank have nothing to do with whether it is a long action or short action. Std bbl thread diameter is listed at 1.055". Large shank barrels are listed at 1.120". Pitch for both is 20 tpi.

[Dennis]

also if i remember correctly the large shank barrel nut is aprox 5/8s of an inch and the small shank is aprox 7/8s of an inch thick measuring the nut from action to muzzle....5/8s is 0.6250 and i just measured a large shank factory nut and it is 0.6530.

the above is correct, and easiest way to determine. Take the 308 barrel off and screw a 6.5 Creedmoor barrel on SET HEADSPACE, and your ready to go after getting your ammo ready. Jut ask for comments here as far as what's everyone's favorite load. The 308 has a .473 bolt head, we call it the 308 family. A 6br is a blast to shoot, accurate, and works well out to 1,000 yards, just a point. There are many choices for this bolt head.

[Newsshooter]

The 6.5 will shoot farther easier too, or with less elevation than the 308. I'm at 8.1 mils at 1K with my 6.5.