Barrel length

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Mr_Logic

Re: Barrel length

#21 Post by Mr_Logic »

I'm not saying it won't work! My 12-twist is apparently too slow for the 168 Hybrids that put me ahead of you :p , but the point is that latest info suggests a faster twist will help, so if you're rebarreling or buying a new rifle, it's something bear in mind.
lapua338
Posts: 521
Joined: Sat Nov 06, 2010 9:23 pm
Location: Surrey
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Re: Barrel length

#22 Post by lapua338 »

Everything that I've read from American sources has validated my previous assumption... a twist rate faster than 1:12 is required for optimum efficiency.

I appreciate that this site is American (link below), however, much of the information is relevant. There's much more to shooting than our very limited (typically slow + deliberate) shooting disciplines of TR, F-TR, F-Class, etc.

Interesting that there's a trend for 6mm and 6.5mm. 6mm Creedmoor being the most dominant cartridge in 2014.

The other posts relating to actions, etc, are also very interesting.

http://precisionrifleblog.com/2014/10/1 ... -pros-use/
Matt

Re: Barrel length

#23 Post by Matt »

Mr_Logic wrote:I'm not saying it won't work! My 12-twist is apparently too slow for the 168 Hybrids that put me ahead of you :p , but the point is that latest info suggests a faster twist will help, so if you're rebarreling or buying a new rifle, it's something bear in mind.
It's worth considering, good job you sneezed a couple of times when you were pulling the trigger though :p lol
Mr_Logic

Re: Barrel length

#24 Post by Mr_Logic »

Definitely. Cold and flu remedies are cheaper than shooting stuff...
The Gun Pimp
Posts: 1154
Joined: Fri Dec 10, 2010 3:08 pm
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Re: Barrel length

#25 Post by The Gun Pimp »

lapua338 wrote:Everything that I've read from American sources has validated my previous assumption... a twist rate faster than 1:12 is required for optimum efficiency.

I appreciate that this site is American (link below), however, much of the information is relevant. There's much more to shooting than our very limited (typically slow + deliberate) shooting disciplines of TR, F-TR, F-Class, etc.

Interesting that there's a trend for 6mm and 6.5mm. 6mm Creedmoor being the most dominant cartridge in 2014.

The other posts relating to actions, etc, are also very interesting.

http://precisionrifleblog.com/2014/10/1 ... -pros-use/
This is a great blog but it is mainly dealing with tactical/sniper matches. However, it's interesting to see how the 6mm has taken over from the 6.5mm cartridges this year. The 6.5x47 and 260 Rem have long been favored by the tactical guys, having good ballistics out to 1000 yards and will fit a std. mag.

Personally, I love the little 6mm cartridges - accurate, nice to shoot, cheap to run - what's not to like? The 6PPC, 6x47, 6mmBR, 6XC are all great little rounds.
Mr_Logic

Re: Barrel length

#26 Post by Mr_Logic »

Can't argue there!
lapua338
Posts: 521
Joined: Sat Nov 06, 2010 9:23 pm
Location: Surrey
Contact:

Re: Barrel length

#27 Post by lapua338 »

An interesting article concerning barrel length vs. velocity from Rifleshooter.com.

http://rifleshooter.com/2014/12/308-win ... 8-to-16-5/
BobSki

Re: Barrel length

#28 Post by BobSki »

Very interesting, thank you.
Hauptman

Re: Barrel length

#29 Post by Hauptman »

BobSki said "Finding a rifle in this calibre that I like is proving difficult. My quest continues."

I had exactly the same problem, here's what I did::

A "donor" cheapo Tikka M595 22-250 ex-foxer (£270 at local gunshop.)
32" Walther 6.5mm barrel blank (£300)
A GRS adjustable Hunter stock for the M595.(£300 second hand......part exchanged for the original donor walnut stock)
Barrel work by Mik Mak, including re-profiling the blank to fit the M595, (it was about 4mm too fat at the receiver end) and threading the muzzle.
Barrel finished at 30"
Moderator borrowed (also fits my Blaser)
There are a couple of bits of "Bling", bolt handle and shroud, just for the hell of it..........

I have a B&M 2-stage trigger on it at the moment, having put the original donor trigger on my 223.

The result? A 1/2 MOA rifle for around £1400...........and the GRS stock is to die for...........a bit "over-barrelled" perhaps, but it shoots.
6.5 Tikka.jpg
Hauptman
BobSki

Re: Barrel length

#30 Post by BobSki »

:good: That looks amazing and well done you for building such a nice rifle from all the components.

I wanted, for my sins, a military style rifle.

I have solved my problem, all be it at considerably more cost than you solved yours! I guess I must be mad but......

I have bought a Accuracy International AXMC. It will be supplied with two interchangeable barrels, both 26" long, one a .308 with 1 in 12 twist, the other a .260Rem with 1 in 8 twist. I just have to be patient now awaiting the return of my FAC with the 260 slot.
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