The savage website says the Axix 243 models use 1:9.25 twist.
The berger website recommends faster twist (1:9") starting at 90 gr.
You might get lucky, but the odds of getting a heavier bullet to stabilize are going to be on the low end. Especially without handloading. That is also why there is not a selection of heavy bullet factory loads. If there were, somebody would buy, try, and complain that they don't group / keyhole out of their factory rifle.
My cousin has a factory Rem700 in 243. If memory serves, it had a 1:9.125" twist. We got excellent results from handloadind Berger high bc 88gr flat base varmint bullets. Not quite as good a bc as vld, but good. And the flat base bullets stabilize at lower twist than a vld will. The load we settled in on chronoed 3244fps. I believe that was a 26" barrel.
On the othe end of the spectrum, some custom setups cannot shoot factory ammo.
I just bought a custom 22-250rem fast twist barrel. 1:7". It should be optimal for 70-90gr bullets. I am shooting 80gr Amax right now. If I ever tried a factory load out of this barrel, I would expect the bullet to come apart in the air from too much RPM.
Hope that helps.
Adam.
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