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Post by HMC710 on Aug 4, 2015 5:07:45 GMT -5
Was going to knock out a DI 22 TCM but changed my mind.....
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Post by 22boomer on Aug 4, 2015 14:36:59 GMT -5
Some kind of Glock thingy maybe? What's the chambering?
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Post by HMC710 on Aug 5, 2015 5:00:49 GMT -5
As they say, set up is everything.... OK, got the easy stuff done.... Ran out of time so we'll see when we can pick up on this one. Caliber? Why should Rock Island have all the fun? 22 U Z of course
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Post by HMC710 on Sept 16, 2015 12:36:16 GMT -5
Not bad for a blind cripple! Almost done....... Dang if the thing doesn't fit ! And cycles manually..... Now I guess I better chamber the darn thing........
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Post by 22boomer on Sept 16, 2015 16:06:25 GMT -5
I'm not familiar with the magazine -- is it a double stack/single feed? I'd love to see what velocity you can get out of the delayed recoil pistol. Did you find a place that can make your dies yet?
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Post by HMC710 on Sept 17, 2015 7:24:43 GMT -5
Made my own dies and reamers and its time to make a new set. I'm still waiting for my real ones to show up. Used S&B 4.4SR primers and they are too hard for the glock to set off. Loading up some CCI rounds now for testing
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Post by HMC710 on Sept 17, 2015 17:49:28 GMT -5
Changed to CCI primers and the Glock fires. Too much weight to cycle action so will get a plan for that. Test load is 7gr of H110 with the 40gr Armscor bullet. 7.5 gr showed some pressure signs.... Have 7 different bullets working with the 22U so far..... you can see a stock TCM in the middle there on the Dog towm box...
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Post by HMC710 on Sept 23, 2015 10:07:14 GMT -5
Just installed an 11 lb recoil spring and with the 33gr JHP, zero recoil and no slide action. Sure wish I had the chrono here.... I need to cut some weight off this thing...... sure hate to cut up a slide, those things are expensive !
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Post by HMC710 on Sept 23, 2015 14:56:36 GMT -5
Have a donor slide coming to see how much weight we can shed.....
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Post by HMC710 on Sept 24, 2015 8:10:29 GMT -5
Getting a quick glok education. My pistol is a model 19 which is a compact model that has a 4" overall length barrel. The full size is the model 17 which has a 4.5" barrel. And, from what I am learning, the slides will fit the other frames, but the barrel "lugs" are cut differently and won't function right. Just like the 1911 Commander slide on Officer frame, Glock guys do the 17 slide on the 19 frame conversion but usually just cut the 17 frame grip down to 19 size. The barrel I copied was from a model 19 and is now cut to 5" in length. I "fluted" the barrel last night to shave some barrel weight, but I didn't pack my scale to see how much I actually took off. I don't want to cut the stock slide because of the matching numbers, so I wait for the donor to get here. I've also learned that Glock has a metal finish process that hardens the slides to about a 65 Rockwell C, that's pretty tough. Lone Wolf SS slides are about 45C so that would have been easier to cut. If money were no object I could buy one already cut, but prices start at $yikes and go to $OMG! So we'll break out some carbide tooling and see if we can put some holes is a stock slide. Using H110 and the Armscor TCM 40 gr factory bullet, I started to see signs of pressure at 7.5 gr. I backed off to 7.3 and loaded up the 33gr JHP and looks like we have some room to go. Also, when our new reamers get here, its going to open up the shoulder a bit and gain some more. Talking with an OEM mfg about barrels so we'll see how that goes, maybe we can give the TCM something to think about....
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Post by HMC710 on Oct 2, 2015 8:09:45 GMT -5
Put the donor slide on the mill and went to work on it. Did a "standard" cut from a picture I found. Still have some room for more metal removal but we'll try this first..... 7.3 hr of H110 with the 33g HP would unlock the action but not cycle the slide. Recoil is virtually zero... I'll try and get weights of the stock set up and the new set up and see what the difference is. Also did a compression test of the 11 lb spring and the stock spring in the closed slide position. Stock spring is 11 lbs and light spring is 7 lbs. This thing is too fun not to get working......
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Post by HMC710 on Oct 3, 2015 13:28:27 GMT -5
Weight our parts last night: Stock M19 barrel = 3.65 oz Stock M19 slide = 12.45 oz Total upper wgt = 16.1 oz (AR bb bolt 14.9 oz + buffer 5.1 oz = 20 oz total) Light slide = 9.5 oz 22 barrel = 5.35 oz 22 upper = 14.85 oz
Using the QL recoil / energy calculator gives us the following data:(based on upper wgt only) 147gr 9mm load 4" barrel recoil data = 21 fps @ 6.8 ft-lbs 40gr 22UZ 5" barrel recoil data = 14.3 fps @ 3.4 ft-lbs
With the lightened upper assembly we are still only generating 1/2 the recoil energy of a 9mm load. According to QL we need to get our upper assembly down to 9.6 oz to match the stock recoil data. We'll see what else we can take out........ To the mill we go!
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Post by HMC710 on Oct 3, 2015 14:21:11 GMT -5
Took out some more material and polished up the chamber I'll get a weight when I get home tonight. Switched powder from H110 to 2400 to get more burn rate. Starting load is 7.0 gr of 2400 with the 40gr TCM bullet. Action unlocked but did not cycle. Modified our QL setting a bit and dropped our H2O capacity to match a 9mm's 13 gr from our simple water test. QL was pushing some pretty large numbers compared to what we were actually getting so we tuned things down a bit. 9gr of 2400 is predicted at max charge with the 40gr bullet so we'll sneak up on it a bit and see what the brass says....
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Post by kiwicollectorar15 on Oct 3, 2015 18:48:16 GMT -5
What weight of spring are you using ?
Can you not put one in that is light enough to only strips a round from the magazine or do you need something lighter than that
You might as well just use it as a blow back and take the locking part out
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Post by HMC710 on Oct 4, 2015 9:52:24 GMT -5
New cut on slide and barrel got us down to 13.05 oz = a 29% reduction 4.55 oz on the barrel = 25% heavier than the stock 3.65 oz 9mm barrel 8.5 oz on the slide = 32% lighter than the stock 12.45 oz slide From looking at my last two rounds fired, the shoulders are being blown forward. That tells me we are unlocking too soon. Is that a function of my barrel geometry or barrel weight? Technically once the barrel unlocks, its weight is removed from the equation. Or is it a function of the faster powder? H110 did not blow the shoulders forward as much. Hey Kiwi, thanks for jumping in here. Spring is an 11lb for a Model 17, so I cut 1/2" off it. Stock is 16 or 18 depending on who you listen to. I can cut the spring a bit more and still maintain some tension on the slide in lock up. I did the same thing to the 1911 in TCM. What I didn't do is lighten the slide or barrel, and the spring was so light it was hard to pick up another round and completely drop the slide. As far as a straight blow back, there is a 22 LR conversion kit for the Glock that looks like a delayed blow back from what I can tell. I don't know if the slide is aluminum or not. So if someone would like to donate one to me, I'll accept! Speaking of straight blow back, we are doing that with the AR. Our "Factory Load" right now is 9.5gr of 4227. That gives us 100% case fill, and good performance from the 8" AR. According to QL, that load is still under max and predicts a pressure of only 25ksi. The AR bolt and buffer wight 20 oz and has no problem cycling at all. Same thing when we did the TCM, the blow backs have to be down loaded to keep them safe. (we are working on that problem by the way....) Like I've said before, this Glock, or any 9mm platform, is way too fun with the 22 UZ so we need to get it functioning. Without changing to an aluminum slide, I think I'm about as far as I can go with weight reduction. That leaves the locking lug geometry, spring weights, and cartridge design. I don't have a lot of taper in the case body so that is something to look at, but may also have a negative effect in the AR. Something we can do today is cut the spring a bit more and see where that leads and polish up the chamber some more. A side note on the finish on the Glock slide, absolutely incredible stuff, bravo.
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