Free: Contests & Raffles.
The rule of thumb is to reduce muzzle velocity by ~100fps/1" bbl length that you cut off (if I recall correctly). Assuming a 150gr. bullet with a BC of .314, fired from a 24"bbl...MV = ~ 2820fps for an average factory loading. Reducing that with the rule of thumb gives you roughly 2420fps and 2020fps for 20" and 16" respectively. I would estimate around 800 yds for the 20" and 500yds for the 16".
Do you mean ar10 or an ar15 in a new .308cal round? As for accuracy and barrel lenght you will only notice a difference when the bullet loose speed and destabilizes
Quote from: demontang on August 17, 2011, 03:56:25 PMDo you mean ar10 or an ar15 in a new .308cal round? As for accuracy and barrel lenght you will only notice a difference when the bullet loose speed and destabilizes I mean ar-15. I know it is not common, but they are around. The reason I want .308 is because I want to take it deer, bear, and elk hunting if I get tired of shooting at long targets (I don't have intentions of shooting an animal at to far of a distance). If there i a better round that you know about that I should be using feel free to tell me.