by I came across this comparison of the Colt SP1 and the Colt Sporter Target Model today. Basically, it was a shooting comparison of the A1 versus the A2. This interests me because I am gathering parts to put together a retro semi-auto version of the M16A1 using a combination of new and vintage parts. I also have a Colt A2 upper that I plan to build on later. More on those in a later post.
The video below is from the Military Arms Channel. They were trying to determine which rifle would give tighter groups with 55-grain 5.56 ammo. The SP1 (aka A1) had the 1:12 twist barrel while the Sporter Target Model (aka A2) has the 1:7 twist barrel. They were using Wolf Gold ammo.
I wonder if he would have gotten better results if he had used something like American Eagle/Federal XM193 5.56 ammo.