6x45mm Twist Rates

[22vartarg]

I plan on getting one of my bolt action rifles re-chambered in 6x45mm but my choice of twist rates are 1:14 or 1:10. I plan to shoot between 60 to 85 grain bullets. The 1:14 will not handle the 85’s, but should be fine with the 60’s to 70’s. The 1:10 will do all of the bullets plus more, but at the sacrifice of velocity. Which would you recommend?

 

[Andy Legg]

1:10

 

[lb-ft]

Easy decision, 10

 

[JSH]

1-10”
That’s what I wanted when I was chasing stuff for a 6TCU build. Only thing they had in stock, with the contour I wanted was a 1-8”.
No issues with it and the added RPM should contribute to splat factor.

 

[painter]

I have 9 twist it does very well with 55 to 87 grain.

 

[ballisticxlr]

Find a different barrel maker that offers more useful 6mm twists. Honestly, how much velocity are you going to lose? 10fps on twist rate?

 

[1lnbrdg]

Find a different barrel maker. 1/9 twist will shoot anything up to 95gr. These barrels last a long time, definitely longer than .223.

Speer 70gr TNT lighter weight bullets for plinking/vermin hunting
Hornady 87gr BTHP are working for deer, very good on coyote if you're not saving hides
Sierra 95gr BTHP MK worked great for deer

 

[jpx2rk]

I've got a 10T 3R barrel on a RAR action, shoots 58g very well, 65 and 70g good but have not done load development on the last 2 yet. I shot all 3 different bullets on break in with good results.

 

[Andy Legg]

Find a different barrel maker that offers more useful 6mm twists. Honestly, how much velocity are you going to lose? 10fps on twist rate?

I agree.....I'd go with a 1/9 at the min.....maybe even a 1/8.

 

[TripleL05]

I run 1:10s on my 6x45s. The 6x45 really shines with “lighter bullets”. Overall length can start to be an issue with the heavy billets. I believe the heaviest I have run is 88 Berger’s in my bolt 6x45, ARs I run lighter. Personally, anything from 70-87s is in the wheelhouse for the 6x45.

 

[22vartarg]

Thanks to everyone with their replies and suggestions… I appreciate it.