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Old 09-17-2013, 13:32   #226
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Hey thks for this info^^^. I don't reload for now, so I will be shooting Underwood, Buffalo Bore and Doubletap SMC ammo. I think your hand loads are warmer than any of their stuff, so if the stock G-4 21 with the KKM & comp can handle your loads 100%, then shooting a mix of the above ammo should work too.
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Old 09-17-2013, 14:24   #227
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http://yhm.net/index.php?main_page=p...roducts_id=118

YHM was mentioned in another post, but this comp may also work with a Lone Wolf barrel. Say a 5" barrel with the .578-28 threading. It's only 3 ports though so not sure if it as effective as the KKM comp.
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Old 09-19-2013, 09:42   #228
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Yes that one should work too, Vaquero Aleman has one of this if I'm not mistaken, here's a recent post of his:

http://www.glocktalk.com/forums/show...8&postcount=23

I'm talking with a guy right now who makes comps and offers any kind of threading you want. I'm seeing if he can't make something like the KKM comp, just longer and with more ports in it. Here's some of his comps and he will do custom work too:

http://www.ebay.com/itm/SAS-Tactical...-/130855446945
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Old 09-19-2013, 12:09   #229
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The 21 Club

This is "Picketpin"s rig. He has it set up for .460 Rowland, and he might be able to give a better perspective on the YHM comp than I can, for the G21.
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Old 09-19-2013, 12:19   #230
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One of the reasons that I decided on the YHM comp is "baffles". A compensator has ports for the escape and directional distribution of gas but also baffling to give the gas something to push against initially. The comp that 460rowland.com uses with their kit has two baffles and two large ports. The KKM comp has two baffles, two large top ports and two smaller side ports. The YHM has three baffles and three large vertical ports. I am, by no means, an engineer, but I believe that the baffling is key in reducing slide speed and, in turn, recoil. Anyway, JMO.
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Old 09-19-2013, 16:43   #231
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I must have missed the question about the YHM comp on a G21... I had a Rowland kit and this combination I put together myself. The combination of the "glock polishing" 460 barrel and YHM comp controls the 460 much better than the Rowland set up did. I am able to go to a 20#RSA and it feets and ejects fine(8-10 feet), even with SWC bullets. I think the YHM comp with Jam nut is much more solid and will stand up to more shooting than other comps I have seen including the Rowland. I hope to play with some BTB WFN designs at some point... Too many projects..
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Old 09-19-2013, 23:15   #232
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Who makes the barrel for the above picture and what is the barrel length (minus comp)?
Thx-
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Old 09-19-2013, 23:17   #233
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Also is that YHM comp about an inch long?
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Old 09-20-2013, 06:17   #234
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Lone Wolf, rechamberd by Glock Polishing, 5.2", 1.75".
That is if this is "the above picture"??
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Old 09-20-2013, 07:48   #235
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Quote:
Originally Posted by picketpin View Post
Lone Wolf, rechamberd by Glock Polishing, 5.2", 1.75".
That is if this is "the above picture"??
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By the by, how and did you solve your problem with the comp coming loose?
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Old 09-20-2013, 08:36   #236
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Quote:
Originally Posted by NoJoy View Post
Also is that YHM comp about an inch long?
My 29 with the 4 3/8" barrel and YHM comp makes the OAL about 9". The 29 stock is just under 7".
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Old 09-20-2013, 16:33   #237
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^^^ Ok the comp with the adaptor is about 2" in length-thx.
I think the comp on the KKM barrel adds an inch to overall length if I remember-
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Old 09-20-2013, 16:34   #238
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Quote:
Originally Posted by picketpin View Post
Lone Wolf, rechamberd by Glock Polishing, 5.2", 1.75".
That is if this is "the above picture"??
The 21 Club
james
Yep thats the one. Thanks for the photo. What was the re-chambering for? (unless you mean for the 460 Rowland)
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Old 09-20-2013, 16:36   #239
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^^^After further review I answered my own question
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Old 09-21-2013, 07:45   #240
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I going to see if SAS will make me something similar to this, with larger side ports though


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I like the standard KKM comp in design, but it needs more porting with warm .45 Super loads, the unit KKM offers is good for standard .45 ACP and surely helps with warmer loads, but I know more can be had and this place is the only place I've found that will work with KKM's 5/8x32 comp threading.

Oh yeah, I'm wanting some set screws in the comp too. I don't know why some don't use them, beats having to always glue down the comp before shooting it.
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Old 09-21-2013, 14:01   #241
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Quote:
Originally Posted by vaquero aleman View Post
By the by, how and did you solve your problem with the comp coming loose?

Well, I have had some other projects and life going on so I haven't been back to the range with my G21 460 yet. I did as you said got heavy with the wrenches and added some blue locktite. All my other shooting I went pretty easy on tightening the combination together. As we know the Rowland is a handfull.

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Old 09-23-2013, 07:13   #242
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I broke down and bought a box of 185gr XTP's. I ordered them online, so they aint' here yet but I'll have something new to play with for a little bit.
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Old 10-04-2013, 12:27   #243
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Firing Underwood 45 Super from my Glock 29.

http://www.youtube.com/watch?feature...&v=W6Mjk5Ryj_s
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Old 10-04-2013, 21:16   #244
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Cool vid aaquero aleman, there's a chance that had you been shooting two handed you might not have had the stoppages that you did. Nice setup BTW.
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Old 10-04-2013, 22:12   #245
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New Data

I got around to playing with some of the 185gr XTP's I had bought not too long ago. In general, I don't really care too much about light for caliber bullets, but then again, sometimes it's just fun to play around. I've now got all three .45 ACP designed XTP's, the 185gr, the 200gr and the 230gr.

The hollow cavities on them are all a little different, basically the 185gr is the most shallow of the three, and the 230gr is the deepest of the three. As you might expect, the 200gr is kind of in the middle, but all three are different. Hornady also rates the 185gr .45 XTP as being as tough as their 180gr .40 XTP, they claim both are good for 1450 fps.

I didn't just load up XTPs, but I also didn't have any 800x data for any of the XTPs, something I wanted to change. The only three powders I used today were Power Pistol and Longshot, but mainly 800x. Same setup as always, Gen4 Glock 21 with KKM 4 port compensated barrel, using stock RSA.

All brass is new Starline brass primed with CCI LP primers. Temperature around 80 degrees and relatively humid. Because there isn't much data for the .45 Super, let alone "warm" .45 Super, here's the deal: ONLY USE IN GUNS PROPERLY SETUP TO HANDLE WARM .45 SUPER. Also, drop the loads a little bit and work up to them in your gun since your setup is likely different from mine. Velocities listed are averages.

185gr XTP, 12.0gr Power Pistol @ 1.240": 1,420 fps

200gr XTP, 11.5gr Longshot @ 1.250": 1,393 fps

I'll get around to trying out some Longshot with 185gr, and for what it's worth the same amount of Longshot has always given higher velocity than Power Pistol in the Super, though PP is usually a bit more consistent.

Next are some 800x loads.

185gr XTP, 15.0gr 800x @ 1.260": 1,568 fps (1,010 ft-lbs)

200gr XTP, 14.0gr 800x @ 1.260": 1,455 fps (940 ft-lbs)

230gr XTP, 12.0gr 800x @ 1.250': 1,298 fps (860 ft-lbs)

275gr Hunters Supply, 10.5gr 800x @ 1.270": 1,190 fps (865 ft-lbs)

300gr Beartooth LFNGC, 9.8gr 800x @ 1.270": 1,147 fps (876 ft-lbs)

All of the 800x loads were very consistent, the 185, 230, and 275gr loads had single digit extreme spreads. A few notes about the loads, with the 200gr XTP, 13.8gr averaged faster (1470 fps) but wasn't consistent at all, with an ES of over 60 fps. I could have got more out of the 230gr XTP, but 1300 fps is plenty fast for a bullet Hornady rates for up to 1250 fps.

I didn't run any 250/255gr loads, mainly because I'm pleased with them running ~1,270 fps/900 ft-lbs, and trying to squeeze out a few more fps won't make any difference in performance.

I don't know really what purpose a 185gr JHP at 1570 fps serves, but it was fun to shoot...and loud.
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Old 10-06-2013, 13:21   #246
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Curious as to how the 185gr XTP holds up, especially since despite having worse sectional density than the 180gr XTP (.400"), Hornady rates them both capable of withstanding 1450 fps. So I shot one loaded with 12.0gr Power Pistol (avg. velocity of 1,420 fps) in some 1 gal. water jugs. Not scientific at all, but water acts like a hard barrier and is usually tough on bullets, and typically if it holds together in water it will likely hold together well in game. It decimated the first two jugs, and stopped in the fourth.

It held together just fine. I think its smaller hollow cavity helps it to hold together better than the deeper cavity 200gr XTP and 230gr XTP, both of which Hornady rates at up to 1250 fps. Despite it's not so good sectional density it really performed well, only one little sliver of lead came off. What's also somewhat interesting is that earlier I had shot a 180gr XTP, also rated for 1450 fps, out of my G23 w/KKm barrel using a load that averages 1,200 fps. It too stopped in the forth jug but shed a considerable amount of its weight in the process...so faster wouldn't really help matters (penetration) with that bullet.

I don't think the 185gr XTP is built for my 1570 fps Super loads, but it seems to hold up to 1400-1450 fps. I guess the point of this post is that it held together better than I thought it would, and penetrated fairly well too.

180gr .400 XTP @ ~1,200 fps:
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185gr .451" XTP @ ~1,420 fps:
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Old 10-06-2013, 14:39   #247
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Good info SD.
BTW, I just ordered some Clear Ballistics Gel and will commence testing high end .45 Super/Rowland and .357 Sig/.40 loads in calibrated gel (may also throw in some bones, barriers, etc). Will post results as generated.

I'm really interested in balancing wound cavity with penetration for a woods carry so figured I better get some measurable data.
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Old 10-07-2013, 08:35   #248
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I look forward to seeing your results Cycletroll, that should prove interesting!
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Old 10-15-2013, 12:57   #249
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Finally figured out this dagnab software. Couple of shots from my G29 shooting Underwood 45 Super. The first and second pic are actually the same 185gr round and the third is a 230gr:

The 21 Club

The 21 Club

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Old 10-17-2013, 16:05   #250
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Nice fireballs!

I have a small project I've got going on, two really. One I have a comp ready to be made that should provide more recoil reduction and slide speed reduction. I don't have it yet, but it's close.

Second, I'm going to fire lapp a few barrels, starting with the Ruger Bisley .45 Colt, but also I'm going to run some through my KKM .45 barrel. There are some definite accuracy gains to be had from doing this, but also a side effect seems to be additional velocity.

For the Ruger, I've got the cylinder throats reamed correctly, but I'm using Beartooth's fire lapping kit to take accuracy up a notch. From reading several articles on it, accuracy increase is sometimes substantial.

However I'm also intrigued on how it would work in making the KKM barrel I use for the .45 Super even more accurate. I was beginning to wonder if perhaps it would be a waste of time, but I found an interesting article and now I'm pumped to get this done to the KKM G21 bbl. I'm really wanting to run big hardcasts in it, and being more accurate is never a bad thing.

Here's an article on fire lapping four different .45 pistol barrels, and pay attention not only to the accuracy gain, but look at the velocity increase. I'm planning on doing my KKM .40 barrels and when I get a KKM 10mm barrel, on that too. Here's the article, I thought it was interesting:

http://www.beartoothbullets.com/tech...h_notes.htm/63
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