80gr amax in a 9 twist anyone ?

[Willoughby]

80gr amax in a 9 twist anyone ?
has any one tried it ? I want to order some bullets , I know I can shoot the 75 gr amax , just not sure about the 80gr , thanks for any input

[35Whelenshooter]

80's would work better form the 1/8 you will possibly have keyholes with the 80's from the 1/9. What speeds are you going to try and obtain ??


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[bc160]

I would bet you should be able to make them work. I have been shooting 95gr bullets out of my 12 twist 6-06 for a long time now. Velocity will play a big role in stabilizing the 80 grainers

[scope eye]

Yes what chambering and how fast are you sending those 75s.

Dean

[Ranger3]

They work well in my 9 twist 22-250 Savage lrpv.

[Willoughby]

I wanted them to work in a 223 factory barrel , my friends factory axis 223 shoots the 75gr real good .5ish - at 100 yards

[Texas10]

75's in a nine twist, 223...sometimes. Depends upon velocity, air density, and bullet length. 75 SMK's probably. A-Max probably not, too long and tend to tumble, but barrel twist rates tend to vary so you may actually have a 8 1/2 twist and be able to stabilize an A-max.

Here's what you need to know; http://www.bergerbullets.com/twist-rate-calculator/

You're looking for a stability index of 1.5 or better.

For example, my 9 twist factory barrel would shoot 75 SMK into tiny groups on a hot (100 F), humid day at a field elevation of 900 ft. But the density altitude is 3500 ft under those conditions. Below 100 F, it shot like crap.