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Posted: 9/4/2011 9:58:24 AM EDT
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Do you guys know what the load data for M193 loads is? I have a bunch of 55gr FMJ- need to know how much powder to put in. Using WC844/H335; what's the powder charge? |
| That may be the correct powders for your M193 loads. Others have used TAC. The M193 peak pressures are above the SAAMI recommended limits so you are sort of on your own there. I think Ramshot has some TAC recipes for M193 action on their online database. If you want many cycles out of your brass, chasing the M193 is going to be counterproductive. Look for loose primer pockets early on in your recycling count. |
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I spend some time trying to dupe M193 when I retired.
After scaring my self with some of the pressure signs I ended up putting an upper limit of 3150fps on all my 55 gr .223 loads that I use in my ARs. That seemed to be the number I could safely duplicate with the greatest variety of powder, primers and 55gr bullets. M855 is a lot easier, and safer, to duplicate. |
| I came up with a load with 62 grain fmj mil-spec from wideners that I got 3148 with;20inch colt barrel and it was on the verge of pressure signs like primer craters.The primers were starting to be pretty flat so I stopped right there.It was with H335 and it was under 25 grains.It actually was pretty accurate too considering that the bullet was a cheap mass produced one. |
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Quoted:
I spend some time trying to dupe M193 when I retired. After scaring my self with some of the pressure signs I ended up putting an upper limit of 3150fps on all my 55 gr .223 loads that I use in my ARs. That seemed to be the number I could safely duplicate with the greatest variety of powder, primers and 55gr bullets. M855 is a lot easier, and safer, to duplicate. I've been working on a load lately with TAC and Hornady 55 SP's. Unlike most of my previous work-ups, I'm finding that hotter is more accurate. Unless my chrono is acting up, I'm over 3200 and accuracy is great in several different rifles. I'm also not seeing any pressure signs. I haven't mic'd case heads but primers are still nice and round. I have a few more loads to test and then I'm loading a big batch with identical components. |
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Quoted:
Quoted:
I spend some time trying to dupe M193 when I retired. After scaring my self with some of the pressure signs I ended up putting an upper limit of 3150fps on all my 55 gr .223 loads that I use in my ARs. That seemed to be the number I could safely duplicate with the greatest variety of powder, primers and 55gr bullets. M855 is a lot easier, and safer, to duplicate. I've been working on a load lately with TAC and Hornady 55 SP's. Unlike most of my previous work-ups, I'm finding that hotter is more accurate. Unless my chrono is acting up, I'm over 3200 and accuracy is great in several different rifles. I'm also not seeing any pressure signs. I haven't mic'd case heads but primers are still nice and round. I have a few more loads to test and then I'm loading a big batch with identical components. I gotta get some TAC |
| It is right in the sweet spot for my 16" AR's. Much more and I start seeing no real gain in velocity or accuracy, meaning I'm just making a louder bang and more muzzle flash. Plus, as was mentioned earlier, you can get into trouble with pressure if you try to get all the way up to actual mil-spec velocities. |
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http://www.frfrogspad.com/miscellq.htm#duplicate
At your own risk. |
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25.2 grains of H335 under a Hornady 55 FMJ is as close to M193 as I care to go. Brass doesn't last more than 4 firing cycles... Loose primer pockets are the usual reason I toss'em.
I get some pressure signs, but they aren't any more severe than LC made stuff (and my loads don't blow primers  )
I caution you to work up to that load, its .1 below max according to Hodgon data. Chrono out of my DD 14.5 is 2850-2900 FPS. |
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