Twist rate for Hornandy 30cal 220gr interlock

[the_blacksmith]

Can't find a minimum twist rate for the 220gr interlocks (p/n 3090) on any hornandy documents. Looking for a big bullet for my ruger guide gun (1/10 twist) in 300wm. This looks like it would be just the thing, unless I need a 1/9 or something. If this wouldn't work, and alternative suggestions? Not too concerned about drag etc, just want a big bullet for up close and personal encounters... I'm thinking a jacketed bullet as well, not really looking for cast for this gun I think. Don't see 2700+fps and cast going well together.

 

[Eagleye]

That 220 RNIL stabilizes just fine in a 1-10" twist. D.

 

[Slamfire]

1:10 should do for the 220gr RN. My 1:10 308 will stabilize 240gr OK.

 

[kodiakjack]

Stick this one in your bookmarks. Pretty handy.

http://www.bergerbullets.com/twist-rate-calculator/

 

[GMC403]

I shoot the 220gr Hornady factory load in my 308 Scout. The barrel is a 1:10 and the velocity is only around 2250fps.

Accuracy is fine at right around 1" @ 100y, I haven't tested them any farther than that.

 

[the_blacksmith]

Thanks gents, I put it through that berger stability calc and it comes out as very stable (3.0 something on the spectrum). So off to the races.

 

[Ganderite]

Yes, it will be quite stable.

The test for stability is a round hole at 100. If it is stable there, it gets more stable as it goes down range.