关于223/5.56弹药问题。

xinxin19

graycat2006 发表于 2013-11-14 14:44
对打精度来说, 并不希望子弹的陀螺效应太强. 因为这种陀螺效应使弹头产生指向性, 会和子弹的飞行轨迹产生 ...

学习中

yankeealpha

graycat2006 发表于 2013-11-14 14:44
对打精度来说, 并不希望子弹的陀螺效应太强. 因为这种陀螺效应使弹头产生指向性, 会和子弹的飞行轨迹产生 ...

"会和子弹的飞行轨迹产生夹角" en...could you provide a drawing to illustrate this? Thank you.

SemperFortis

yankeealpha 发表于 2013-11-14 14:01
Question:
My understanding is that 'slow' twist cannot properly stabilize heavy bullets as there is ...

Very light bullet and fast twist rate = jacket seperation

For example 40gr vmax in 1:7, the thin jacket will come apart at high rpm. Unless the bullet is made of different construction, such as solid copper.

Rule of thumb is to stick with 55gr or heavier for 1:7.