stubbicatt
Member
Guys, I have a 20" 243 barrel. I know that it will be somewhat handicapped in terms of velocity over a standard length 24 or 26" barrel. Due to excessive laziness just now, and no particular desire to deploy the CED chronograph to verify my suspicions, I have two somewhat interrelated questions.
1) Since the tube is shorter, will I see any improvement in velocity given an 80 grain bullet by using 4350 over say RL15? I guess in my mind the slower powder would still be burning upon bullet exit where the faster RL15 would be totally consumed in that barrel length.
2) Given whatever velocity handicap I have imposed on myself with the shorter barrel, would I do better to choose heavier bullets for my applications in effort to retain trajectory and downrange energy? --Ferinstance, a 55 grain bullet at some of the velocities I see published is really attractive to me to the reasonable distance of 300 yards, but am concerned that any energy gains due to the hyper velocities possible in this combination (E=MxV^2) may be lost due to the shorter tube. Would retained energy due to velocity be more than offset by use of a heavier projectile in a shorter barrel?
Not so sure my posting is clear, but I hope you guys get the gist of it.
Regards,
Stubb.
1) Since the tube is shorter, will I see any improvement in velocity given an 80 grain bullet by using 4350 over say RL15? I guess in my mind the slower powder would still be burning upon bullet exit where the faster RL15 would be totally consumed in that barrel length.
2) Given whatever velocity handicap I have imposed on myself with the shorter barrel, would I do better to choose heavier bullets for my applications in effort to retain trajectory and downrange energy? --Ferinstance, a 55 grain bullet at some of the velocities I see published is really attractive to me to the reasonable distance of 300 yards, but am concerned that any energy gains due to the hyper velocities possible in this combination (E=MxV^2) may be lost due to the shorter tube. Would retained energy due to velocity be more than offset by use of a heavier projectile in a shorter barrel?
Not so sure my posting is clear, but I hope you guys get the gist of it.
Regards,
Stubb.