This guy got similar results to my own.
This guy too
As well as G&A
The following I found interesting and it nicely written. It shows a loss of about 25fps per inch of barrel loss. While I realize it is a bolt gun and that a gas gun will run slightly slower the correlation is the same.
Also I realize that some folks only believe in 30 cal sticks and I say if you can shoot it as fast and as accurately as you can a 5.56 carbine, you are a blessed man and I commend you. Some just hate the AR platform, OK but don't base it on stories or experience from Vietnam. Things are very different from 1970.
John Mosby had this to say about that...
This conversation is not intended to instigate a debate on the merits of the Stoner platform versus anything else, nor is it intended to foment discussion on 5.56 versus 7.62. The first has been completely dispelled, in the realm of this blog at least, by the refusal of all those opposed on principle to Stoner’s design, to accept my standing challenge on the “Last Word” page. The second is simply not open to discussion here. I KNOW 5.56 kills people, dead. I know 7.62 kills people, dead. I choose 5.56 because it kills people, dead, plus I can carry more of it, meaning, when necessary, I can kill more people, dead. Additionally, because it has less felt recoil, I can kill them faster, because shot-to-shot recovery is faster. Are there guys out there that can recover from 7.62 as fast, or faster, than I can from 5.56? Perhaps, but those guys don’t need any advice on setting up their fighting rifle. Most guys can’t recover from 5.56 as fast as I can from 7.62. I choose 5.56 because it works, for me. I don’t moderate comments, but I WILL delete comments that hold no merit to the conversation, on this article, if the only thing you have to say is along the lines of “Stoner was stoned!” or “Mouseguns are for pussies!” –J.M.
High velocity rifle bullets, even .223 size, do incredible damage to flesh within the range they are effective. Fragmentation isn't a myth and under about 100 yards is pretty predictable with 55g NATO ammunition .
On zero, look use what makes sense to YOU.
To all of those who are still pretty new to this stuff, first I would like to thank you for waking up and learning. It takes courage to begin to question reality as it is presented by pop-culture. Get out there and DO, don't just read. There is no experience like personal experience and seeing it for yourself from YOUR equipment will make you more confident and better prepared.
Equipment isn't the only part of the equation, you are the multiplier and you are the part of the math that is not negotiable. PREP YOU as you get your preps straightened out. Don't just accept stuff you read, get out there and see for yourself.