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Posted: 1/25/2015 5:55:18 PM EDT
[#1]
what do the primers of the rounds that didn't fire look like?
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Posted: 1/25/2015 5:56:26 PM EDT
[#2]
Can you give more details on the rifle? Buffer, barrel, gas system?
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Posted: 1/25/2015 5:58:21 PM EDT
[#3]
Quote HistoryQuoted:
what do the primers of the rounds that didn't fire look like? I believe he meant that every time he heard ''click'' he came to find there was not a round chambered. |
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Posted: 1/25/2015 6:01:49 PM EDT
[#4]
Quote HistoryQuoted: what do the primers of the rounds that didn't fire look like? |
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Posted: 1/25/2015 6:05:51 PM EDT
[#5]
Quote HistoryQuoted: Can you give more details on the rifle? Buffer, barrel, gas system? |
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Posted: 1/25/2015 6:08:54 PM EDT
[#6]
I have 14.5 bcm middy also. I shoot 55 grain xm193 all the time no problems, I would look into a standard h1 buffer. Did you build the upper from scratch or order it complete?
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Posted: 1/25/2015 6:15:25 PM EDT
[#7]
Quote HistoryQuoted: I have 14.5 bcm middy also. I shoot 55 grain xm193 all the time no problems, I would look into a standard h1 buffer. Did you build the upper from scratch or order it complete? |
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Posted: 1/25/2015 6:19:56 PM EDT
[#8]
Did you use a standard weight buffer spring? Also, are you running a full auto bolt carrier or a semi?
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Posted: 1/25/2015 6:22:41 PM EDT
[#9]
Essentially yes. You also want to make sure it is a standard carbine main spring. Clean thoroughly, lube well. I can also suggest shooting a couple hundred rounds of hotter ammo, then go back and try some lighter stuff.
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Posted: 1/25/2015 6:36:43 PM EDT
[#10]
Right from BCM's website:
"These 14.5" mid length gas barreled upper receiver groups have been specifically tuned to be a very soft and fast shooting set up. They are a joy to shoot, but please feed it good ammo. With good milspec pressured ammo we have been running H buffers. We do not recommend using lower powered ammo. If using less than milspec pressured ammo, it may be best to run a standard carbine buffer." |
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Posted: 1/25/2015 6:42:29 PM EDT
[#11]
Quote HistoryQuoted: Did you use a standard weight buffer spring? Also, are you running a full auto bolt carrier or a semi? I'm using a Springco Blue Enhanced Power Carbine Spring. It was sent with my Buffer. Had to go back and look, but it is a full auto BCG.
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Posted: 1/25/2015 6:43:55 PM EDT
[#12]
Quote HistoryQuoted:
Right from BCM's website: "These 14.5" mid length gas barreled upper receiver groups have been specifically tuned to be a very soft and fast shooting set up. They are a joy to shoot, but please feed it good ammo. With good milspec pressured ammo we have been running H buffers. We do not recommend using lower powered ammo. If using less than milspec pressured ammo, it may be best to run a standard carbine buffer." That is listed b on their site. I however have not had a problem with any .223 I've shot in mine. I mainly shoot xm193, I've also shot pmc bronze, ppu, american eagle, and some Remington, all 55gr no problems. |
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Posted: 1/25/2015 6:51:25 PM EDT
[#13]
I would say it was a successful build meant for eating the pricier rounds. A standard strength buffer spring may be the solution for cycling the lighter, cheaper rounds.
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Posted: 1/25/2015 6:57:49 PM EDT
[#14]
Quote HistoryQuoted: That is listed b on their site. I however have not had a problem with any .223 I've shot in mine. I mainly shoot xm193, I've also shot pmc bronze, ppu, american eagle, and some Remington, all 55gr no problems. Quote HistoryQuoted: Quoted: Right from BCM's website: "These 14.5" mid length gas barreled upper receiver groups have been specifically tuned to be a very soft and fast shooting set up. They are a joy to shoot, but please feed it good ammo. With good milspec pressured ammo we have been running H buffers. We do not recommend using lower powered ammo. If using less than milspec pressured ammo, it may be best to run a standard carbine buffer." That is listed b on their site. I however have not had a problem with any .223 I've shot in mine. I mainly shoot xm193, I've also shot pmc bronze, ppu, american eagle, and some Remington, all 55gr no problems. Thanks. May try out a standard buffer and see how it turns out.
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Posted: 1/25/2015 6:58:22 PM EDT
[#15]
Quote HistoryQuoted: I would say it was a successful build meant for eating the pricier rounds. A standard strength buffer spring may be the solution for cycling the lighter, cheaper rounds. Thanks, may give a standard buffer a try and see how it goes.
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Posted: 1/25/2015 7:04:14 PM EDT
[#16]
Here's what my build turned out looking like
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Posted: 1/25/2015 7:11:14 PM EDT
[#17]
From what I have read Monarch may not be the hottest load out there and that may be more of the problem than the bullet weight coupled with the Spikes buffer.
I am currently working up my hand loads for my 14.5 and this is what I have seen. All were used with a 55 grain bullet. I started at 23 grains of powder and worked my way up to 25 grains. I do this to find the most accurate load for my rifle. When shooting the 23 grain rounds the brass discharged nicely between 4-5 o'clock. As I shot the 10 different loads on my way up to 25 grains the brass discharge changed. It went from discharging from 4-5 to 1-2 meaning it was ejecting harder hitting the shell deflector and going forward. Basically the hotter the load the hotter the brass was ejected. All the experimenting was done with a standard buffer which weighs approximately 3.8 ounces. If I find the hotter loads are more accurate I will go with the Spikes which weighs 4.3 ounces and possibly a heavier spring. Guess that was a long answer to say try a lighter buffer and/or some hotter ammunition |
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Posted: 1/25/2015 7:14:40 PM EDT
[#18]
Quote HistoryQuoted: From what I have read Monarch may not be the hottest load out there and that may be more of the problem than the bullet weight coupled with the Spikes buffer. I am currently working up my hand loads for my 14.5 and this is what I have seen. All were used with a 55 grain bullet. I started at 23 grains of powder and worked my way up to 25 grains. I do this to find the most accurate load for my rifle. When shooting the 23 grain rounds the brass discharged nicely between 4-5 o'clock. As I shot the 10 different loads on my way up to 25 grains the brass discharge changed. It went from discharging from 4-5 to 1-2 meaning it was ejecting harder hitting the shell deflector and going forward. Basically the hotter the load the hotter the brass was ejected. All the experimenting was done with a standard buffer which weighs approximately 3.8 ounces. If I find the hotter loads are more accurate I will go with the Spikes which weighs 4.3 ounces and possibly a heavier spring. Guess that was a long answer to say try a lighter buffer and/or some hotter ammunition Will do! Thanks. The Monarch ammo was a gift and it was all I had at the time. Thanks for the info man!
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Posted: 1/25/2015 7:20:24 PM EDT
[#19]
Quote HistoryQuoted:
14.5 BCM midlength barrel, spikes St-T2 heavy buffer, midlength gas system. Quote HistoryQuoted:
Quoted:
Can you give more details on the rifle? Buffer, barrel, gas system? There's your problem. While some do run fine, the majority of 14.5" BCM midlengths that I've run across (one being mine) didn't like .223 pressured ammo. I'm pretty sure BCM advises to use 5.56 pressure stuff with these specific upper configurations in order for them to run 100%. I'd drop down to a standard carbine buffer. It may fix your issue. |
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Posted: 1/25/2015 7:36:56 PM EDT
[#20]
After some break in with hotter rounds you can revisit the cheaper and lighter stuff to see if it works well.
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Posted: 1/25/2015 7:54:20 PM EDT
[#21]
What I want to know is if the gas block is properly aligned? Have you done anything to check the flow? While holding the muzzle downward and with the barrel upright, I usually shoot a good bit of Gun Scrubber down the gas tube to see whether it slowly drips out or if it streams out. If it slowly drips out, the gas block would not be aligned properly. If it immediately streams out, it is good to go. Also, I would suggest running a standard or "H" buffer. I have a build where I have used the BCM 14.5" mid-length barrel and run a standard buffer and spring. I am also using a NiB BCG. It runs extremely smooth. So smooth that when I first took it to the range to test it, I was not even sure if the second round was chambered. I had to visibly check and it was. It has functioned 100%. Additionally, I would recommend using XM193 ammo (5.56 NATO 55 gr.) or anything similar. A lot these mid-length barrels do not have the gas port size to accommodate the weaker .223 ammo.
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Posted: 1/25/2015 8:19:11 PM EDT
[#22]
What you did with the heavy buffer and stiffer recoil spring was, you prevented the gun from cycling with the weaker ammo. With a mid-length gas, you use a standard spring and buffer. That's all you have to do; get a standard spring and buffer. So, to the question, yes, you have a problem AND a peculiar rifle. :)
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Posted: 1/25/2015 8:19:29 PM EDT
[#23]
Sounds like with the heavy spring, buffer, and extra carrier mass you might be short stroking.
Run a few mags of M193 or M855 through it and see how it performs. You're either oversprung or undergassed for the loads you're shooting. Another thing to keep in mind, when trying out that new rifle I ALWAYS use standard ball ammo. Adding in some non-standard load or loading just adds another variable if it doesn't function properly. |
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Posted: 1/25/2015 9:28:34 PM EDT
[#24]
Sounds like the general consensus is to swap to an H buffer and spring and to check the alignment of my gas block. Thanks a lot guys for your help!
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Posted: 1/25/2015 10:13:05 PM EDT
[#25]
Quote HistoryQuoted: Sounds like the general consensus is to swap to an H buffer and spring and to check the alignment of my gas block. Thanks a lot guys for your help! |
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Posted: 1/26/2015 8:31:05 AM EDT
[#26]
Topic Moved
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Posted: 1/26/2015 8:32:59 AM EDT
[#27]
Topic Moved
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