What Barrel Length and Twist for a 270WSM Build

[oneeyejohn]

Proof makes a 1:8.4 .277 blank

I have a Bartlein 8.5 twist 24" in 6.5-06 and it shoots better than I can hold the rifle still, I dont shoot over 130 gr bullets in it because it is a varmint rifle with a short throat.

 

[Stockbroker]

I am going to have to go at 7 or 7 and 1/2, the company I'm working with does not offer an 8. Would you recommend a 6 groove, or a 5r twist?

6 groove conventional over 5R

 

[Jmathis]

6 groove conventional over 5R

Perfect thank you.

 

[1894C]

The 270wsm is a kick *** round! The most versatile round ever! 1:8 twist and you can do it all.

Almost as versatile as 7 wsm.

 

[Jud96]

26" 1-8 twist from Bartlein, Hart, or Benchmark

 

[Raudy707]

Almost as versatile as 7 wsm.

Yeah explain that one? You can shoot 180's and 195's but the 7wsm is almost non-existent. While the 270 wsm and 300 wsm thrive. Always has puzzled me.

 

[alcesgigas]

Cut rifled, 26" one or two up from standard weight, gain twist 1:9-7.5 (or 7.75) for monoliths.

 

[1894C]

Yeah explain that one? You can shoot 180's and 195's but the 7wsm is almost non-existent. While the 270 wsm and 300 wsm thrive. Always has puzzled me.

Excellent question that I don't have an answer for. Mine shoots 180 ELDm at 2940 and is easy on brass. I can beat 3050 easily with rl23 but it's hard on brass at that point.

 

[albritt]

Unless you are going to dedicate the rifle to 800yds + anything longer than 22" is just extra weight and length to lug around. All the stats, loading data, extended barrel lengths and worries over FPS does not replace trigger time. A rifle that shoots sub .5s with anything between a 30" barrel or 18" barrel will kill everything in North America with heavy enough bullets and ample trigger time!
If we spent as much time at the range as we spend talking about shooting we would all have been giving Chris Kyle a run for his money!

4 GROOVE HAND LAPPED MATCH BARREL

 

[DWier]

6 groove conventional over 5R

8 twist will shoot anything you want to shoot and shoot it well. I agree 22-24 inch barrel is also fine unless you are shooting 800+. The twist calculator for the 170s I believe says nothing slower than 8.5. 8 is faster. Since you have the option you may want to talk to Berger and Hammer (these are my preferences) regarding going down to 7.5 given bullets are getting longer and I doubt we've seen the end of bullet development. Perhaps that way you may be ready for 'the next big thing'.

 

[Jud96]

The number of lands and grooves and the shape of them shouldn't concern 90% of shooters or hunters. There's really not any proven data that one rifling style or design is any better than the next. Don't get caught up on it. Buy a barrel from a proven manufacturer and shoot it. Your load, your skill, and how the rifle is chambered and put together is what the main focus should be on.

 

[Ryan Worsham]

The 6.8 Western that Winchester is releasing in January might be right up your ally.

 

[albritt]

The number of lands and grooves and the shape of them shouldn't concern 90% of shooters or hunters. There's really not any proven data that one rifling style or design is any better than the next. Don't get caught up on it. Buy a barrel from a proven manufacturer and shoot it. Your load, your skill, and how the rifle is chambered and put together is what the main focus should be on.

Hear ye hear ye

 

[Eric Alexander]

Cut rifled, 26" one or two up from standard weight, gain twist 1:9-7.5 (or 7.75) for monoliths.

you've done this? what can you share?