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Old July 22, 2019, 06:16 PM   #51
stagpanther
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I’ll have a go at it . .30 carbine I always wondered about an AR in that caliber.
LOL--I would much sooner track down an M1 carbine (ALMOST bought one at a lgs a while ago but the previous owner had done a bit too much modernizing for my tastes).
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Old July 22, 2019, 08:05 PM   #52
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M1 Carbine in a AR-15...thats a 300blk loaded with 110 grain Round Nose made for a 30 carbine.
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Old July 23, 2019, 01:41 PM   #53
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.357 Sig has been scratching at the back of my brain for this, since the beginning. But that seems too "common" for something 'really completely different'.

.400 Corbon, though... That's unpopular enough that it might fit.
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Old July 23, 2019, 02:33 PM   #54
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Since I already have a Glock chambered to 9x25 Dillon the 357 sig has no appeal to me.
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Old July 23, 2019, 06:50 PM   #55
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Looks cool, how about a 10mm Magnum?
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Old July 23, 2019, 07:19 PM   #56
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I've thought about that--but what does it bring to the table that a 41 mag doesn't? Either way I would need a custom bolt probably.
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Old July 24, 2019, 03:39 PM   #57
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50GI?
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Old July 24, 2019, 03:54 PM   #58
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someone already guessed that--and the answer is no, I'm not willing to go that far out on the bleeding edge. : )
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Old July 25, 2019, 01:33 PM   #59
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I'll take another stab at it...
22TCM?
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Old July 25, 2019, 01:56 PM   #60
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That looks very interesting--but I'm already committed to something in large frame.
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Old August 20, 2019, 10:09 PM   #61
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Has to be the slowest reveal in TFL history...
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Old August 21, 2019, 08:42 AM   #62
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Has to be the slowest reveal in TFL history...
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And the most disappointing. My original negotiations broke down mostly due to lack of knowledge on making a PCC. I then switched to plan "B" and settled for-- as some of you had guessed-- a 9 x 25 Dillon barrel and bolt made by RMWXtreme. That however looks like it may take a very long time before it's completed, so in the meantime I started testing some loads based on a simple 10mm blow-back set-up.

The Circle 10 receivers with Odin stock set-up is very efficient in handling the recoil and bolt thrust of higher power loads even with a heavy bolt carrier. The Glock magazine remains a PITA with certain bullets when "swatted" into the chamber. I wish to the Gods that Colt made a magwell adaptor for large frame cartridges like their 9mm one.
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Last edited by stagpanther; August 21, 2019 at 08:48 AM.
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Old August 21, 2019, 12:53 PM   #63
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Bummer...but wish you luck with the 9x25 moving forward.
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Old August 21, 2019, 01:44 PM   #64
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Gonna be a long wait on 9 x 25 dillon--but eventually will look forward to seeing what it can do--shouldn't be too hard getting lighter bullets to go very, very fast.
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Old August 22, 2019, 07:28 AM   #65
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Which mags do you use in your Glock for the 9x25, the 10mm?

No feeding issues?
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Old August 22, 2019, 07:50 AM   #66
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Which mags do you use in your Glock for the 9x25, the 10mm?

No feeding issues?
I use standard Glock 10mm mags (though I don't especially like their design--a far better one IMO would be Colt's 9mm scheme enlarged to handle the 10mm/45acp/40SW etc) The only chokes I've had in my Glock 9x25 have been due to operator error--if I relax my grip enough that can cause a FTFeed--but as long as I hold it hard and steady and use a strong enough charge it operates reliably with a wide variety of bullets. I drop test every cartridge I load into the barrel prior to use. The Lone Wolf barrel I bought years ago was perfectly made, very sad they won't make them anymore. I configured mine to handle "full house" loads--and it does it with aplomb.

The 10mm case, like the smaller 9mm, in my experience is prone to widening at the base and weakening at the web after repeated loading. My personal theory is that the Dillon, by virtue of having a bit of shoulder, resists these stresses better over repeated reloads--I generally don't get many reloads of powerful "straight up" 10mm or 9mm cartridges before they expand too much at the base and are prone to splitting the case at the web.
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Last edited by stagpanther; August 22, 2019 at 08:00 AM.
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Old August 23, 2019, 01:26 PM   #67
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What was the original idea, 44 automag?
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Old August 23, 2019, 02:42 PM   #68
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Similar-- a 45 super +P.

I just got back from another session of "working out the bugs" with this build. I was experiencing a fairly high number of cases splitting and getting stuck in the chamber; even with relatively low power loads. I've got a fair amount of experience with blowback AR's in 10mm using Glock magazines--the blown cases are generally not the direct result of an overpowered cartridge; rather the angle of the feed from the Glock magazine often causes the BCG to slam the cartridge with quite a bit of force into the wall of the chamber doing one of two things, sometimes both. 1) it can easily set the bullet back in the case, which can cause a pressure spike; and 2) it stresses the case unnaturally sideways, giving the case a propensity to split at the web.



I had always "blamed" this problem on the high pitch angle of the cartridge as presented by the Glock magazine but I just happened to have a spare new nitrided KAW valley 10mm/40S&W BCG on hand and decided to swap it out with my older BCG, was surprised to see that there was an entirely different construction, the newer one resembles more closely a conventional 9mm carrier--but the "dummy gas key" has been moved significantly forward, as well as using a conventional AR style extractor as compared to the older 10mm BCG. Upon switching to the newer BCG the rifle fired and cycled without a hitch.

The circle 10 lower came assembled, but apparently came with a conventional strength bolt catch--in a blowback 10mm this will eventually fail, and mine blew apart today on about the 10th round down the tube. I replaced it with a seekins enhanced bolt catch--I would prefer to use a titanium one but those are basically "unobtainium."

PS-- I've actually found a few--but they are generally around $100 a pop!
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Last edited by stagpanther; August 24, 2019 at 04:25 PM.
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Old August 25, 2019, 07:18 PM   #69
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Today I ran Hornady 180 gr xtp's using their max load of 14.9 grs. of Accurate 9, about as good as it gets for a 10mm cartridge in terms of velocity/energy. It clocked 1700 fps @ 1150 ftlbs at the muzzle and an SD of around 9 fps for 5 shots. my groups weren't especially good, around 2 MOA at 100, but it was very windy today--might get better results second time around. Being a blowback it makes a mess of the inside of the upper.
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Old August 26, 2019, 07:14 PM   #70
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Tried the same load again today, less wind and true to my classic style, I managed to shoot a flier wide with each group.





Ordered some 180 gr golden sabres and Winchester HP's to see if they shoot any better than the xtp's
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If you’re ever hiking in the woods and you get lost, just look up and find the brightest star in the sky and you’ll know which way space is.
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Old August 27, 2019, 05:42 AM   #71
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You and I must be distant relatives or something. I too consistently seem to get that errant flier. I do it so consistently I don't count it as part of a group when working up a load. What's really annoying is four out of five almost in the same hole and then that other one about an inch away. Especially since the four in one hole is so rare to begin with.
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Old August 27, 2019, 05:51 AM   #72
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You and I must be distant relatives or something. I too consistently seem to get that errant flier. I do it so consistently I don't count it as part of a group when working up a load. What's really annoying is four out of five almost in the same hole and then that other one about an inch away. Especially since the four in one hole is so rare to begin with.
Doesn't seem to matter how many with me;; up to 5 anyway, 2 out of three, three out of four and four out of five will be close. As soon as I get a good group going--the pressure is on to finish well.

Low BC pistol bullets using a volatile charge of AC9 is tough enough to begin with, I'm still pretty happy with these results, the bullet arrives at 100 yds with more energy than most any load out of a pistol barrel leaves with. The felt recoil is tremendous for a charge of under 15 grs. of powder; something along the lines of a stout 308 load IMO. While still far less than something like a 458 socom, it still is "disconcerting" knowing it's coming from a diminutive cartridge like the 10mm--which I still think should be called "minimag."
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I am NOT an expert--I do not have any formal experience or certification in firearms use or testing; use any information I post at your own risk!

Last edited by stagpanther; August 27, 2019 at 06:01 AM.
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