Originally Posted By: muskrat30
After consulting with a gunsmith prior to a custom 22-250 build I went with the standard twist rate of 1/14". We talked extensively about it. One of the 1st things he asked is the bullets I planned to shoot, and what use for the gun. I can't see going over 55 grains, most being 50 and some 52. Plus the added speed of a 22-250 may factor in with some bullets.
This is why my AR-15 varminter, my .223 AI, my 22/250 as well as my Krieger barreled .220 Swift all have 1/14" twist. I never shoot anything heavier than 55 grain bullets in the Swift and never anything heavier than 50 grain in the others. The 1/14" twist is perfect for that weight as well as the 40 grain bullets which I also shoot, but not as often as I do the 50's.
Something that is not often mentioned is that when you go to a tighter twist pressures go up as well. How much so I don't know. Now having said that were I to ever need to rebarrel any of the above mentioned guns I think that I would go to a 1/12" twist next time just so that I can use up to a 60 grain Vmax should I want to. Wouldn't mind trying some anyway.