230 gr in a 10 twist

[VLD Pilot]

I have 10 shot sub 1/2 MOA targets @ 1000 that say it works.

230s in a 10 twist ?

 

[Blake72]

230s in a 10 twist ?

YEP

 

[VLD Pilot]

YEP

That's awesome.

 

[Blake72]

300WSM .238 freebore 230's with 69 grains of 7828SSC with CCI 250 30" barrel

 

[VLD Pilot]

300WSM .238 freebore 230's with 69 grains of 7828SSC with CCI 250 30" barrel

Great combo

 

[lancetkenyon]

My 28" 1:10" .300RUM shoots a 230 Hyb (not OTM) @ 3113fps w. R-P brass with 8-10 firings over Retumbo. Shoots .2s @ 200, and .4s out to 1200. Taken coyotes from 45 to 1368 yards with them.

 

[VLD Pilot]

Berger does recommend a 10 twist or faster for that bullet. It's the 230 Sierra that may have troubles stabilizing in a 10 twist

 

[Alex Wheeler]

You have to test at long range. If stability is on the edge it can shoot one hole at 100 but at 1k you will have vertical issues. I would error on the faster side if your at lower elevations. Some of the best 1000 yard BR AGG records are around 1.8 on the Miller scale.

 

[L.Sherm]

Am I all wet on this or does the miller scale not take altitude into there calculations?

 

[Alex Wheeler]

It does, but I do not believe the Miller scalle is ideal for long range. Most of the 1000 yard group aggregate records are in the 1.8 range on the Miller scale and thats what I shoot for. Lots of really good 1000yd combos in that 1.8 range. If I was shooting 100-200 Id go with less.

 

[Deleted member 119066]

delete, missed page 2

 

[Bravo 4]

My 28" 1:10" .300RUM shoots a 230 Hyb (not OTM)

Reading this thread I was confused on which bullet guys were talking about. The two are not the same, the OTM is shorter than the hybrid. However, the consensus is they both seem to work in a 10" twist.

 

[pdshooter2]

300 win mag 230 excellent accuracy, hits at 2000, very repeatable at 1 mile 26" bbl

 

[Benchrest Braxton]

FWIW I run 53 vmax out of my 1:12 twist 223 with an Sg of 1.02 with great results. It completely falls on its face at transonic (very erratic vertical), but before that its sub 1/2 moa all day out to 600 in calm conditions.

Run some numbers on your typical 1:12-1:14 22 cal centerfires. Absolute garbage for Sg's (in some cases below 1), but many people have great results despite this.

Obviously if you have a choice in the matter, then of course, choose a twist rate to give you 1.5+ Sg for optimum bc and transonic/subsonic transition results.

What i'm saying is just because the calculator shows a less than ideal number please don't be a afraid to try it out.

p.s. my altitude is only 500 feet asl.