Posted on 09/08/2019 5:05:05 PM PDT by E. Pluribus Unum
This is a trick question. Far inferior round for anything but auto suppressive fire. So the answer is AR-10.
;)
7.62x51 is a good round for sure. 5.56 isn’t bad with the right barrel, match bullet and sight, though.
FYI:
Mad Dog by far in the homeless community ...
Agreed on pistons vs. direct impingement.
Four Reasons Why the Operating Rod AR-15 Might be the Worst Gun Idea Ever
https://blog.cheaperthandirt.com/reasons-operating-rod-ar-15-worst-gun-idea/
German citizens can’t buy an AR-15 made in America because of ITAR. Meanwhile we have them out like candy to the Palestinian Authority government, the Iraq government, Syrian rebels, etc...
I've seen thousands of rounds go through many of their weapons in training and have a lot of 1st hand professional experience with them. I also own one.
Very, very few failures, they shoot beautifully and clean up very easily.
Pity, every screw I’ve ever had was wonderful.
“The Germans over-engineer everything.”
Saw a documentary a while back about WWII German tanks. They were deadly when they were up and running however constantly broke down for that very reason. The documentary went on to state more german tanks were destroyed by their own crews while broken down in the field (to keep them from falling into the hands of the Allies) than Allied forces destroyed.
5.56 has a 12% kill rate. After 100 yards, the power drops off significantly. It was made with the idea the m-16 was full auto and soldiers could carry more. Civilian ar 15s are not full auto, therefore they lose that capability from the start. I’ve seen enough bs to know when something is happening, I’m grabbing the m-14 heh. I do however hope the bad guys have ar15s heh.
22LR and 22 CF are not the same bore and groove dimensions. While 22LR shoots in a 22 CF barrel, it is undersized and not really very accurate. there are dedicated 22LR components ( barrels, action groups etc) that will make an AR platform about on par with a modern bolt 22LR match gun however, with appropriate sights/optics.
There is virtually no difference in bore diameter between the 22LR and the .223. Many times I suspect there is zero difference.
The real difference is most .22LR barrels have a 1 in 16 twist which over the last 150 years has been determined to be a good average.
My Colt H-Bar had a 1 in 7 twist. I would have guessed that would be too fast but in actual shooting it seemed to make no difference. On the other hand a .223 68 grain would tumble if fired in a 1 in 16 twist barrel.
Indeed, you are correct ref. twists- However, SAAMI indicates that the bore/ groove of the 22 CF is .219/.224 while the 22 RF is .217/.222
Pages 11-13 depict chamber/ bore dimensions of the 22 RF family, ( excepting the archaic 22 WRF and the newer 22 RFM) while other documents depict 22 CF as being as I stated.
Shooting a 22RF in a 22 CF barrel provides for a very loose ( almost nonexistent) fit and unless one buy specifically designed large diameter 22 RF ( yes, Lapua and some other European companies make them), your RF adapter is is great for short range/large target practice. That said, I killed myriads of squirrels with 22LR fired rom a Savage 24 22 RFM/410 combination gun.
If I wanted to do well with accuracy and terminal ballistics on the cheap with something very common, a civilian load and rifle a little better than the following would do (especially the second paragraph under “Mk 262”).
https://en.wikipedia.org/wiki/Mk_262#Mk_262
If I were going to spend some money and carry more weight, though, it would be on something between 6 and 7 mm.
I do use the 77s, and they’ve done well. My buddie’s 16 inch barrel put rounds on steel at 1100 yards, but I far prefer my 6.5mms.
Handloading, butchering hillbillies are also far more practiced and can usually do great shot placement, which matters heh.
Good stuff for handloading nerds, BTW. Low cost, too.
Shooting Chrony chronographs
http://shootingchrony.com/index.htm
I use a magnetospeed. The only complaint I have is changing rifles, sometimes you need to add or remove a shim. You can shoot groups, it’ll give you your average speed and a spread differential. I did that on some loads. Did 100 yards then put my numbers into strelok app (I know, cheating a bit), then I used those numbers and dialed to 1100 yards, and first round strike. Then I put 5 more on steel (18x18”). Was a 6” group (begara hmr).
I’m making a load for 143gr eld-x now.
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