Johnn Peterson
CGN Ultra frequent flyer
- Location
- Chemainus B.C.
The ones I have had built all had 1:14" twist barrels and handled bullets up to 275 gr with no problem at all. The Husqvarnas all came with 1:12 twist. All were very accurate. The Nine Norma just seems to be a very well balanced cartridge.
I do know of one that was rechambered from 35 Whelen. It had a 1:16 twist and did just fine. Not surprising, because the "little" 358 Win will stabilize 250 gr spitzers at only 2200 fps.
If I were building one today, I would probably go 1:12. Never hurts to have a bit extra.
Ted
BTW, I still have some 275 gr Hornadys around here if anyone wants/needs some.
PM sent concerning the Hornady 275's and I've attached a Bullet Stability Calculator that was sent to me a while back.
Something for you to plan with.
