Hello gents. I need of a bit of input. I'm apologizing ahead of time for the long explanation, but I'd like to explain my thought process so you can all tell me where I'm wrong. (ok I means stupid lol)
I decided that an SBR would be my Christmas present to myself. Being that I like to do things myself, I am planning on building one from parts.
That being said, I have an issue with the efficiency of a 5.56 sbr. Apparently all those science people in lab coats say that if the bullet (5.56 specifically) is traveling less than 2400 fps, it looses that magic they call hydro-static shock and also won't tumble (yaw) reliably in soft tissue.
Reading up on my history a bit, the original M16 had a 1-14 twist rate. This made that 55gr bullet highly unstable and made it tumble almost immediately upon impact. In the arctic conditions the Air Force worked in, this made the weapon unacceptably inaccurate. So the twist rate was refined to 1-12, which had the unintended consequence of reduced the tumbling effect nearly 40%. This eventually was refined down to 1-7 by the time the m16a2 and M855 bullets were introduced.
The only accuracy I require out of this weapon is to hit a paper dinner plate at 100 meters. So accuracy isn't top priority here. I know 10 moa. Not asking much at all there. My top priority is making that bullet tumble reliably at short range without having to use space age bullets at matching prices.
I've already found a barrel maker that can make this barrel for me at a price not much more than a stock barrel. I just want to hear your input on the idea.
Thanks gents.
I decided that an SBR would be my Christmas present to myself. Being that I like to do things myself, I am planning on building one from parts.
That being said, I have an issue with the efficiency of a 5.56 sbr. Apparently all those science people in lab coats say that if the bullet (5.56 specifically) is traveling less than 2400 fps, it looses that magic they call hydro-static shock and also won't tumble (yaw) reliably in soft tissue.
Reading up on my history a bit, the original M16 had a 1-14 twist rate. This made that 55gr bullet highly unstable and made it tumble almost immediately upon impact. In the arctic conditions the Air Force worked in, this made the weapon unacceptably inaccurate. So the twist rate was refined to 1-12, which had the unintended consequence of reduced the tumbling effect nearly 40%. This eventually was refined down to 1-7 by the time the m16a2 and M855 bullets were introduced.
The only accuracy I require out of this weapon is to hit a paper dinner plate at 100 meters. So accuracy isn't top priority here. I know 10 moa. Not asking much at all there. My top priority is making that bullet tumble reliably at short range without having to use space age bullets at matching prices.
I've already found a barrel maker that can make this barrel for me at a price not much more than a stock barrel. I just want to hear your input on the idea.
Thanks gents.