Re: Gain Twist, Transitional Twist Barrels
I have experience shooting a very fast gain-twist in 338 LM Improved (12 twist down to a 5.4" exit twist). Like Agustus, I got mine and use it to shoot prototype lathe turned solids. Jacketed bullets simply can't take the velocty torque combination (I know I shot a few without a break to see how they performed).
I suspect it will be another 6 months to a year or possibly 2 (absolute worst case scenario) before the person I am working with here in the US has a 6.5 caliber or longer solid that is ready for mass/public distribution. We are very close on an individual shooter basis, but the ability to meet multiple demands just takes some time. As some folks already know, waiting 9 months for a barrel is big impediment to someone entering the arena.
My time frame prediciton is just my $0.02 based on my current testing schedule (my new job has dramatically reduced my ability to get range time and do stability and accuarcy testing).
If someone has a 6.25+ caliber long projectile that has been field-tested and flight-verified for stability, I'm happy to shoot them and report how they perform in my rifle.
Jeffvn