Thanks for the info, Blue and others. Invaluable to a noob..
I remember the first time I shot an AR--my buddy's S&W M&P carbine--I was surprised at the 'recoil'. That is, how much it moved on target. I attributed it to the BCG and buffer springs all moving back and forth. Decided a good bolt action was where it was at.
Now that I have one I wonder if I should have shopped for a middy. After reading this I've ordered a heavier buffer and spring. Should get them this week and I'll do some side by side testing to see what happens. I'm not planning on comp with it (yet) so perhaps it's a waste but I'm an OCD tinkerer so can't help it. If I ever shoot out this barrel, I'll try a mid length next time.
Interesting...the Campfire CAN be a source of helpful info...
Thanks for the bump, AS. (I first followed the link from the other thread).