Sierra makes two pointed 117s - a SPT and a SBT - for long range shooting. IME the Sierras lack a bit in structural integrity, tending to shed their jackets in game. But they do kill well.
The 10" twist rate is fine for 100-grain bullets, particularly the longer versions like the Nosler BTips and the Barnes X-bullets. It is the length of the bullet which primarily determines its stability at a specific spin rate, not just its weight.
One of my .250s has a 12" twist and it has less accuracy with the longer 100s than it does with 85s or short 100s, particularly when top velocities are not used. This suggests that the 12" twist rate may be marginal for the long 100s. The 10" rate should be perfect, IMO anyway.
09-30-2005, 07:54 AM
Threaded Mode