Talk about Capitals hockey & more! > General Discusion Anything But Hockey
Guns and Blowin Shit Up!
richkrt99:
Well I WAS considering building an AR platform utilizing a 7.62 x39 cartridge....OR honestly considering an AK style for my "next gun", BUT....
thanks to Sleepy Joe and his Russian ammo ban....Why bother? All the fargon AK ammo is going to skyrocket in cost.
If they aren't making up ways to make legit gun parts illegal - they just going to make it impossible (or impossibly expensive) to get ammo.
But hey - let's keep that stuff out of law abiding citizens' hands, but yet by all means leave a crapload of ordinance in Afghanistan for the Taliban to use against us and our allies.
richkrt99:
--- Quote from: alta on Monday August 16, 2021, 12:48:14 PM Eastern ---I was bored yesterday so I did some more reading at M4 carbine dot com. One thing that's poped up repeatedly for a home assembled rifle that's having cycling issues is to make sure the gas port in the barrel is lined up with the hole in the gas block. A common mistake for newbies is to install the gas block right up against the shoulder on the barrel, its not supposed to be. Having said that, the hole in the gas block is always bigger than the one in the barrel to help avoid such things.
I do stock 4198 for the AR, but Im loading 6.8, and its at the top(or more) of the book listings. I have not experienced cycling issues with those loads, and Im running the heaviest buffer those rounds will cycle.
just checked the 6.8 middy, its got the A5 H4 buffer in it which the book says is 6.8 ounces, thats ironic. But like I said, Im running hot ammo.
--- End quote ---
I assembled one of my lower "Kits" this weekend. PSA Multi "Liberty" lower with (slightly) upgraded trigger, Hogue soft grip, and Hogue over molded stock (standard buffer & tube) and mounted .223 Wylde upper with 18" stainless barrel and Nickel Boron BCG. Looks good.
But.....It won't cycle this friggin load either. I did not think it had a chance, but figured I'd give it a shot. I believe the trigger has a harder hammer strike, so I was hoping maybe that or the longer barrel would maybe make a difference, but ignition didn't really seem to be my issue. Also, the pull on the charging handle (buffer spring) seems really heavy, but I know it's a standard buffer spring. Maybe I'll pop the lighter spring in there, but FFS I really don't think it will matter.
I now have three distinct AR guns that all fire flawlessly with factory ammo (PMC 55gr, Hornady 55gr-5.56 Frontier, some 15 year old shit I haven't used up, some walmart greentip from 10 years ago), as well as my initial IMR 4064 hand loaded rounds. All of this fires and cycles through every gun without issue.
I have swapped uppers and lowers from gun to gun, tried different buffer spring, swapped BCG, changed firing pins and bolts, loaded hotter and hotter until flattening primers and stuck cases and still can't get this to work. Tried different primers, different bullets, etc. I thought I must have just totally messed up the initial loads and mis-measured the powder, but I started over 10 rounds at a time and still get nothing. The powder is NEW and dry.
I have not tried a LIGHTER bullet yet (or a heavier one). All the data I can find for 4198 uses 55gr and below. I thought I had some 52gr bullets, but I do not. I have a few 62 and 75, but no load data for those with 4198
I see there's load data for 7.62 x 39 Russian (which I was considering building), but Sleepy Joe says no, no, no :raised-eyebrow:
Having fun building though :wackysmile: . Maybe some day I can shoot one of them more than a few rounds at a time.
alta:
I love my nickle boron coated BCGs, but its still an AR and they still need lube. I put one together one once that then sat in the safe for several months. When I finally took it to the range I forgot to lube the bolt /carrier. After two shots I was having feed issues, I then had that doh moment. Pulled out the bottle of lube and its run flawlessly ever since.
and 55 grain is the lightest bullet Id run through an AR, unless I lived out west in prairie dog country. Then a 45 would suffice, and only for prairie dogs. As it is, i like 62-77.
alta:
it also seems to me you are ignoring buffer weight and thinking too much about buffer spring weight. There are different weight springs, but thats for ultra fine tuning, not getting the rifle to cycle. In fact, if you aren't shooting competition, the standard buffer spring is more than sufficient.
so, based on what you've posted til now, I'd say lube and/or a lighter buffer weight will fix your problems
richkrt99:
I recently stumbled across four boxes (80) rounds of some .223 I bought with my original AR, which I purchased in the late 90's (98 or 99).
It was in the pockets of one of my soft rifle cases. It is South African and has a picture of an antelope on the box ;D
It shoots fine - been stored in a cool & dry place indoors (in my bedroom closet)
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