Rifle Barrel length & twist questions

[Brad61537]

Hello All,
Looking for some opinions, and or suggestions for my next project. I'm going to be sending in my 7mm Rem Mag to have a new barrel installed. Should I go with a 27' or 28' barrel, and I'm thinking either a 1-7 or 1-8 twist. I'm doing this for long range accuracy, but also to hunt with. It's a small sporter style barrel so I'm not worried about the weight difference. The bullets I reload love a tight twist so I'm thinking 1.7 twist. For the barrel length is there any noticeable gain in going with a 28' over the 27'? I have heard more accuracy & faster fps with the 28' & I've also heard that there was no noticeable difference?
Thank You,
Brad.

 

[WCB]

I think accuracy would be more of a function of the barrels affinity for the bullet and the reloaders capability all things being equal.

Depending on powder a marginal gain in velocity if you are only talking an inch of barrel....20tf per second as an optimistic guess probably less.

 

[Brad61537]

Thanks for your input, after researching it including talking with the bullet mfg I've decided to go with a 27in barrel & 1-8 twist.

 

[DenverCountryBoy]

Depends on velocity, which depends on bullet weight and charge.

Slower velocities need to have the spin imparted in a shorter distance to achieve the same stabilizing RPM.

 

[willtim]

In general, shorter barrels tend to be more accurate.

 

[GotDraw?]

In general, shorter barrels tend to be more accurate.

... and longer barrels are a pain the ass when moving through brush

 

[GotDraw?]

Barrels aren't like dicks, if you're going to hunt with it you want the shortest barrel you can get that gives you sufficient velocity.

JL

 

[Rob5589]

Accuracy will come from a perfectly cut chamber and how well a load you can develop. 28" is looong and unnecessary. An 8 twisted barrel with stabilize 195's no problem. I wouldn't even consider 28" for hunting, even 26 is plenty long with many saying too long. Not even pushing hard, I could get a 180 smk to 2960 with a 26".

 

[Pk_in_Dallas]

A 27” rifle with a muzzle brake is crazy long. I wouldn’t go any longer than 26” if you are putting a brake on it. Carrying around a rifle with a 27” plus a couple inch brake would be like hauling around a javelin when hunting.


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