is still a pretty good day.
It was a bit disappointing, however. I took the new-to-me AR upper and the lowers that I had built for it out to play, and the darn thing just would not feed from either of the lowers or from either of the magazines. If I bounced the darn thing on the polymer magazine the round would go in, but otherwise nada.
So I packed it up and took the Glock 36 to the pistol range next door and put 50 aluminum cased rounds through it. It had one FTE, not a stovepipe, where the ejector just slipped past the rim of the empty and didn't get it out. It came out with no issues, and that was the only problem with the aluminum cases.
Next, Range Partner had brought a couple hundred old reloads with him, so I helped him burn them up. I put 100 rounds through the 36 with only a few issues due more to light loads, I never had a squib but there were one or two that didn't go bang with enough authority to properly cycle the slide.
The verdict: since changing the barrel I haven't had a single problem with the gun that could not be attributed to ammo. Also, I managed to ring the steel consistently although I couldn't consistently hit the small swinging targets. So, I still suck at this game, but not as bad as once upon a time. Dry firing helps.
Once I got home I consulted the Internet regarding my AR issues and found that I have an M4 upper receiver mounted to an AR barrel. The difference is in the feed ramps. On the plain AR the feed ramps are integral only to the barrel extension (the rear-most part of the barrel that is fluted to mate with the bolt; so much to learn with the AR platforms); the regular AR has a flat front wall on its upper receiver with no ramps and the ramps on the barrel extension stop at the outside edge.
On the M4, however, the feed ramps continue down into the front wall of the upper receiver and the barrel extension ramps are slightly deeper so it makes a smooth transition between the ramps in the upper receiver and ones in the barrel extension. The idea is that the M4 will feed better at faster cycle rates or with rounds bigger than the standard 5.56 which, mine being a 6.8, is.
The result of my setup is a ledge where the ends of the AR barrel extension ramps meet the ramps in the M4 upper, and that combination with my lowers and magazines tip the rounds downward just enough to catch that ledge. Funny thing is, the original setup (I bought just the upper, the guy I bought it from kept the lower to put a different upper on it) worked just fine.
The cure is to either swap to an M4 barrel, or take a rotary tool or round file to the barrel extension ramps to match them to the receiver ramps. There is some debate as to whether it's a good idea to do this while the barrel is mated to the upper. I think this may be a job I'll leave to a gunsmith.
In other news, it looks like I may be picking up a .357, so I have that going for me. The last .357 I owned was a Taurus that I got from a "friend" over some money he owed me and then later found out that it had been lifted from his mother in law's truck, so I had to give it back.
I am more certain of this one's ancestry, so that won't be an issue, but it is a lightweight S&W that is...let's say, somewhat uncomfortable...to shoot a lot due to the recoil inherent in a powerful cartridge and a light gun. I'll put some .38 through it for practice and keep the high power loads for business.
It's been too long since my last range day, but now that the weather is getting better I will work at improving that.
