Home Forums Hunting & Shooting Custom Rifles & Wildcats 243AI twist rates for heavy/LR?

Pondering a build just for heavier bullet options...90-115?

1:8 or 1:7.5 or?

Grooves?

Thanks

I only run 105 Amax and VLDs so I get by with 8T.

No way I'd be building any 6mm these days slower than a 7 1/2 twist.

Yup.
I’d go straight 7 if it were me.
Never know what the future hold for bullets nowadays.

Would 1:7 over stress anything around 90? Is gain twist worth it? I just don’t envision shooting true varmint bullets, but even my ‘varmint’ hunting for totes, cats, and foxes would likely get 85gr at the lightest....more likely just whatever LR deer or target load I’m running. I don’t worry over pelts or shoot a lot of those. More concerned with a LR range/form work gun that’s a good medium/long deer/hog poker. Contour and length questions would be next, but I’m pondering 23-24 and #2/3...depending on weight....medium heavy spotter. Don’t want a 9-10# gun, but7-8 is right there.

You're not gaining anything with the 7 twist. It would be for bullets we don't even have yet. I can stabilize 115DTACs with an 8 twist.

The 115 DTAC isn't ideally stabilized in all environmentals in an 8 twist.

Correct Jordan.

I’d rather be ready for a (hypothetical) 119gr ABLR, while giving up nothing, than be topped out at any current 105 hunting bullet. DTACS probably aren’t my best choice for hunting, but somebody should come along with something. Wish there were long 25s 😉

Why don't you just go with a 1:4 twist then.

Take a look at the Hammer bullets they recommend a 1-6 for their 110 VLD type bullet. In the 6mm AI the 115s will shoot in a 1-8 but I wonder if I am giving up much BC value or terminal performance by not having the optimal twist? David Tubbs I think shoots mostly 1-7.5" or 1-7.7" in the 6XC with the 115 DTAC though not sure what he is using now.

depends on your barrel builder........

don't over look the 6XC with a 7.5 or 8 twist......

much more barrel friendly........

http://www.accurateshooter.com/cartridge-guides/6xc/

Have killed a lot of critters with a 1x8 twist 6mm and 105 gr. Scenars, Rio7

7.5 or 7. There are several 6mm bullets that need a 7 twist, the 110 sierra matchking and 115 berger vld require them according to the makers.

I recently put together a 6mm creedmoor using a 1:7 criterion barrel on a bighorn origin action. It's a hammer using the 105 berger hybrids I had sitting around.

This is just my opinion but I have been tinkering around with fast twist 6mm's for about 20 years and to me a 1-8" twist with 105-107gr bullets is just about right with a 5 or six groove barrel. faster twist, less grooves, heavier bullets, more velocity just make everything more tempermental and not necessarily better.

I shoot a standard 243 with a 22” 8 twist Douglas barrel and 105 Berger hunting bullets and have had excellent luck out to 1000 yards. I like the 105s at 2900 they do well. Heavier bullets would be cool but not sure anything heavier than a 105 in a 243 is needed.

Got a 7 on mine but think I would have been just fine with a 8 or 7.5. A 108 eld is all I will need to shoot due to their badazzness
I’m at 168 ft above sea level and the 7 will twist everything I can feed it.

Thanks for all the replies and insight

I’m not to sure about the hammer bullet suggestion, after I looked them over. Seems a 357 pistol bullet could have a better BC than what they tout. Might as well just shoot an 85 TTSX way faster. It probably has a better Bc. ???

The other question: if I stumbled on an 8 twist rig for a good deal, should I turn up my nose and build my own 7-7.5 twist, or just Rick it and see how heavy it’ll go?

If starting from scratch I'd do a 7 project 7.5 twist. but I wouldn't miss out on a good deal on an 8" twist.
My 243AI is an 8 twist and handles any 105 I've tried along with 108 ELDs.

If my heart were set on 115s I don't think I'd risk a 1 in 8".