Hi guys, I am having a rifle re barrelled, I want a 1:12" really but that isn't an option unfortunately.
The twists available to me are 1:10 or 1:14.
The bullets I plan on using are as follows:
311041, 311407, 311446, 311291.
The longest is 1"
I would prefer to shoot these at 1000-1500 fps
Stability calculators suggest I can take these bullets down to 750 fps before they loss stability, so in theory I want a 1:14 kinder on the cast than a 1:10.
But does anyone have any real world experience of shooting bullets in the 150-180 grain .850-1" range at these sort of velocities in a 1:14 twist?
If so how slow could you go before you lost stability?
My only current 30 cal has a 1:10 barrel so I can't do the experiment myself.
I know the 1:10 would do it easily, but if I want to push hard the 1:10 will be hard on the bullets!
I need to let the smith know next week which twist to go with, I want the 1:14 but I haven't got the confidence without some empirical evidence to say go for it. The 1:10 is a safe bet but the 1:14 could be better.
Any advise greatly appreciated.