RE: 35 Whelen rifleing twist.
I've never used the 1-10" twist...it's a trifle fast I think.....IIRC Remington uses a 1-16" twist and IMO that's a bit slow.
I'd have no problem with the barrel you have.....use it as it'll stabilize all the bullets you shoot and will even handle the unusually big ones from Northfork and others that make 270-280 grain bullets for the .358 cals.
Have a ball.....