I've searched the board and found plenty of input on what twist to use with the 115-grain 6mm DTAC. However, everything I've seen has been concerned with *rifle* velocities. I'll soon build a 6mm silhouette pistol,haven't decided on a chambering yet) and I plan on launching DTACs at no less than 2200 fps nor more than 2500 fps. I expect to stay consistently in the 2300-2400 fps range.
In that velocity range, what rate of twist should I be looking for? Based on my past experiences,some of them quite bad, though quite educational) I strongly prefer to err on the side of "too-fast" rather than "too-slow" a twist. I'm also aware of the twist rate manufacturing tolerances that can bite you when you run on the edge of stability; that's yet another reason to prefer faster twists to slower ones.
TIA for any help,
Ben in Texas
PS - Any musings on chamberings are also welcome. I sort of assumed, when this project first coalesced in my mind, that I'd chamber for 6BR. Lately, though, I've been looking at the 6mmAR. Any thoughts, especially about attainable velocities from a 15-inch barrel?
In that velocity range, what rate of twist should I be looking for? Based on my past experiences,some of them quite bad, though quite educational) I strongly prefer to err on the side of "too-fast" rather than "too-slow" a twist. I'm also aware of the twist rate manufacturing tolerances that can bite you when you run on the edge of stability; that's yet another reason to prefer faster twists to slower ones.
TIA for any help,
Ben in Texas
PS - Any musings on chamberings are also welcome. I sort of assumed, when this project first coalesced in my mind, that I'd chamber for 6BR. Lately, though, I've been looking at the 6mmAR. Any thoughts, especially about attainable velocities from a 15-inch barrel?