Originally Posted by
Sundo
Okay, it's time to reveal my possible choices.
My current top two choices are the LWRC M6A3 or the POF P415, both in either 16" or 18" barrel, both in 5.56/.223. I will also consider DI designs, but leaning toward piston. I've also read about the LWRC SPR which should become available "mid 2010".
The few reviews I've seen show the M6A3 14" doing .7 MOA groups and the M6A2 16" doing 1.0 MOA groups, bench rest, heavy match ammo. I've read a review of the P415 18" doing .7 MOA. Those are very few points of comparison.
Ideally, I'd like to be able to make consistent hits at 750 yds with heavy factory match ammo, on an 18" target. That's about 2.5 MOA at 750 yds. To get that, I estimate I need to get .75 MOA groups at 100 yds. Is this realistic, or too tight? I'm guesstimating that .75 MOA at 100 yds grows to 2.5 MOA (that's MOA, not inches) a 750 yds.
Based on this, I think I'll be happy with a rifle that has the velocity to reach 750 yds supersonically (Black Hills 77 gr HPBT), with .75 MOA accuracy at 100 yds. It sounds like I just might achieve that with either the M6A3 or P415. What do you think?
I'm starting to think the 5.56 chamber is a limiting factor on accuracy, as DPMS rifles with true .223 chambers seem to be more accurate. I favor the 5.56 chamber for reliability, but want to get as much accuracy as I can without going custom.