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10mm
Feb 2, 2017 15:26:29 GMT -5
Post by HMC710 on Feb 2, 2017 15:26:29 GMT -5
Tried some new extractor geometry today and still not getting the operation I would like. I'm getting about 50% ejection rate. The groove on the 10mm is cut very deep and it really grabs the AR extractor so I thinned it out today to let the fired case roll off the claw, but its just not working out the way I would like. My next move is to add a deflector bump or thin the claw out some more.
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10mm
Feb 2, 2017 17:41:11 GMT -5
Post by HMC710 on Feb 2, 2017 17:41:11 GMT -5
This is after round two on the extractor.... You still had to twist the round out of the bolt
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10mm
Apr 18, 2018 20:58:55 GMT -5
Post by HMC710 on Apr 18, 2018 20:58:55 GMT -5
Seems like once a year or two we get a run on 10mm's. Doing three of them right now..... we'll, two + a 10 Mag
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10mm
May 28, 2018 20:30:49 GMT -5
Post by HMC710 on May 28, 2018 20:30:49 GMT -5
Houston, we have lift off!
Tested the latest 10mm yesterday and ejected like a champ! Used our Tok mag/adapter set up and our new Short AR mag set up. Need to do some follower mods on the new AR mag, but it shows promise.
Now to get some more loading done so we can test and tune the new mags...
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10mm
Jun 2, 2018 21:31:03 GMT -5
Post by HMC710 on Jun 2, 2018 21:31:03 GMT -5
10mm is running good and I have to admit, it just feels like it has power. The 357 ARMag is ok, but the 10 feels "heavier" We definitely need to work on mag geometry to get it feeding smooth like the 357 ARMag does.
But, to kick the 10mm to the curb..... Tested the 10mm Mag today. Used some std load data and stretched OAL to 1.67 to take advantage of the M1 mag space. With 200gr JFP it was just into the lands and way too much pressure.....
Pulled the remaining test loads and dropped the charge down and will test tomorrow. Modified a std 6.8 extractor to a new profile and had ejection so we'll keep going on this thing. Way cool.
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10mm
Jun 11, 2018 20:55:43 GMT -5
Post by HMC710 on Jun 11, 2018 20:55:43 GMT -5
Did some more testing and did some R&D on the new mag set ups. Hopefully will make some universal adjustments that will make all the mags feed better.... Time will tell, but its hard to get enough spare time to make all this happen
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10mm
Nov 7, 2018 22:15:23 GMT -5
Post by HMC710 on Nov 7, 2018 22:15:23 GMT -5
To add more gas to the fire...….. 10mm, 10mm Magnum, 10mm Maximum, 10 Max w/180gr JHP We use 6.8 SPC cases to do the 30 / 357 Herrett stuff. At one time I estimated that the 30 Herrett (Rimless Tactical per Marty) was one of the best 30 cal AR rounds out there. I bumped some cases up to 357/8 and one up to .400" Finally made a couple expanders today and opened up some cases. I figure to trim them back to 1.600" just to give the case mouth a good square cut and "standardize" it at the Maximum length. QL predicts 2400 fps+ from 16" brl w/180gr bullet at 50ksi pressure. I'll order a couple blanks and get some new brass and see what happens..... in my spare time of course....
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10mm
Nov 8, 2018 8:47:27 GMT -5
Post by paulsblackrifles on Nov 8, 2018 8:47:27 GMT -5
Cool, waiting to hear more! I have a 10mm blowback build I should finish, got most of the parts.
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10mm
Dec 25, 2018 11:47:33 GMT -5
Post by HMC710 on Dec 25, 2018 11:47:33 GMT -5
Got a couple blanks in with this last order. Now I need to get a reamer together to get the Maximum length. Got a couple of 10mm Mags to build so will get them out of the way and do some more mag testing with the M1C-AR set up. In the meantime, I'll work on the new reamer geometry and send it off to Dave at Manson.
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10mm
Mar 3, 2019 14:09:40 GMT -5
Post by HMC710 on Mar 3, 2019 14:09:40 GMT -5
Building another 10mm and working on Mag geometry. The larger dia case requires different feed ramps so we'll put one together for testing and then see if the smaller dia rounds will feed with the 10mm set up.
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10mm
Mar 18, 2019 18:01:30 GMT -5
Post by HMC710 on Mar 18, 2019 18:01:30 GMT -5
Tested 10mm Mag the day I was back and feed and function was 100%. I think I'll do a wee bit of mag work even tho it worked as is. Those rounds are fat so I tried both the poly and metal versions.
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10mm
Mar 24, 2019 19:18:44 GMT -5
Post by HMC710 on Mar 24, 2019 19:18:44 GMT -5
Worked on the 10mm Mag Large Pistol Mag and both versions feed 100%. The larger dia rounds need some different geometry, but they are working and its nice to have a BHO! No time at the shop so getting them when I can.....
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10mm
Apr 14, 2019 21:56:07 GMT -5
Post by HMC710 on Apr 14, 2019 21:56:07 GMT -5
Ran the 10 mm DI tonight on the SP mag but I cheated and seated the rounds out to 1.36"
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10mm
Jun 2, 2019 13:40:15 GMT -5
Post by HMC710 on Jun 2, 2019 13:40:15 GMT -5
Machined out an NFA 45glok lower for the next 10mm DI build. Will get some g mags ordered and load up some ammo...
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10mm
Jun 2, 2019 17:51:04 GMT -5
Post by HMC710 on Jun 2, 2019 17:51:04 GMT -5
Milled out two 80% lowers from New Frontier using their jig. Not a bad set up, everything worked as it should. Don't have any glok 10mm mags so I used our modified PSA 9mm glok / TCM lower for the 10mm to test it out. We modified the last couple 357 Sig gas systems and they are much better so did the same mod for the 10mm with the same good results. Feeding was ok, but the barrel was set up for our Tok mag feeding which is a bit lower than the glok style, but it still fed. Next one we'll set up for glok feed. Ran a new load of 8.2 gr of Power Pistol w/200g FMJ (plated) bulk bullets. QL est at 1350 fps from an 8" brl
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