Quote:
Go with the 1:9.5. If you ever want to shoot the Barns 110gr. TSX or any of the "soon to be released" bullets from Nosler or NwCP you will need the faster twist. We have test barrels in both and can not tell any difference in max velocity. Barrel length in this cartridge DOES make quite a bit of difference in velocity.
John
Hmmm, I wonder why the guys over at the 6.8forum get
considerably different results, in their barrel twist
tests? According to the experienced 6.8 shooters, the
1:11 twist has no problem stabilizing the 115 gr. Barnes.
The faster twist barrels do show signs of pressure,
sooner, as development load charges are increased. But
if one isn't pushing for max. velocity, then barrel
twist rate isn't a big issue. Also, chambers like the
SPC II, and the DMR, allow for higher velocities, before
signs of pressure over the orginal 6.8 SPC SAAMI chamber,
again according to the testing done by the "experts" at
6.8Forums. From what I can glean from those discussions,
the SPC II chamber is the most important change to get
higher velocities, or to even shoot "combat" loads, from
Silver State. As soon as RRA makes good on a 8 to 12 week,
now 12 to 16 week promise, which is actually now 20 weeks,
for a 6.8 SPC upper, I will get to actually run some of
the "expert" discussion, through a real barrel. When
it gets here, it will be a SPC II chamber, in a 1:10 twist
barrel. This will probably be the last RRA assembly
for me. I have grown weary of the "We are waiting on
barrels, and flash suppressors" lie. They are making
6.8s for dealers, they should be making good on promises
of 8 to 12 weeks...Heck I would be happy if they made
good on the second 12 to 16 week promise /ubbthreads/images/graemlins/angry-smiley-055.gif
Squeeze