9x25 Dillon: How have I never heard of this round before?

[ChicagoRonin70]

So, I just acquired a 4.6" ported Lone Wolf 9x25 Dillon conversion barrel for my Glock 29SF for less than $80, thanks to LWD clearing out their old logo-ed stock at basement prices and some skilled Goog-fu coupon code snooping (use backtrail12 for 10% off Glock parts on Lone Wolf's site). Then I went to Underwood Ammo and cleaned out their last 4 boxes of 50 rounds of 124-grain XTP hollow points.

 

It's essentially a 9 mm round in a necked-down 10 mm case. Underwood's versions actually say 10 mm, according to the info on their site. I don't need to do anything but just drop in the new barrel and get to blasting.

 

Now, I'm a 10 mm aficionado most definitely, and already have several extended and/or compensated barrels for my 29SF in that caliber, plus a .40 S&W conversion barrel, all from KKM Precision, which are amazing. However, KKM does not make a conversion barrel for the G29 in anything other than that caliber. I've liked the idea of the .357 SIG as a conversion barrel, so I was looking at Lone Wolf for one, then I saw the 9x25 Dillon, which is essentially a .357 SIG on HgH and testosterone boosters. Underwood's .357 SIGs in 115 grain are loaded to 1,550 fps, and their 124 XTPs are 1,475 fps . . . while their 124 XTPs in 9x25 Dillon are less than 2 bucks more a box ($38-ish to almost $36 for the SIGs in the same projectile weight loading)—plus, the Dillons are rated at 1,700 fps by Underwood. A video linked to on their site shows someone getting that out of a 6" Glock 20, and which out of a 4.6" barrel top 1,600 fps (out of my ported barrel, maybe a smidge more; I've been noticing that Underwood seems to have a bit of a boost out of compensated barrels, so maybe it will be the same with the ported).

 

In any case, I already partially broke my New Year's resolution, which was no more new guns this year. Well, technically I only half broke it, because I am just converting the one I already have into yet another caliber option.

 

I am going to be extremely interested to see how the much smaller round in the Dillon as compared to the lightest I shoot in .40 S&W and 10 mm, which is Underwood's 140 grain Lehigh Defense Xtreme Penetrator. That blows out of my 5" compensated KKM barrel at well over 1,500 fps, so a 9 mm bullet blasting at over 1,600, that should be some fun shooting.

 

I also understand that Double Tap has a 80 grain lead-free loading that will exceed 2,100 fps, and a couple of 95 grain ones that will reach 2,000 fps—out of a freakin' pistol!

Sure, DT tends to overstate velocities by as much as Underwood understates theirs on the box, which is why I prefer getting more for my money from a home-state manufacturer like Underwood, but still, even 1,900+ fps with a 124 grain bullet is going to be a blast, literally and figuratively. It's essentially a .357 magnum and then some in a Glock. If this is as good as I suspect it will be, I am not sure which I will enjoy more, super-hot 10 mms or this new high-velocity toy.

 

I sort of hope that it's not too fun and that I don't enjoy shooting it too much, because it's not a super-popular round. heck, I never heard of it until just today!

 

Here's a picture of, left-to-right, .357 magnum, .357 SIG, 9x25 Dillon, and 10 mm, from Gunblast.com. It's interesting that the necking down of the 10 mm enables equal performance out of the same sized projectile as that big-@ss .357 mag round, especially from a 29 Short Frame like I'm going to be shooting it out of.

 

http://www.gunblast.com/images/9x25Dillon/DSC05310.JPG

[thobart]

It's a competition round that was used prior to going to .38 super in a lot of open and competition guns. When the power factor was lowered the .38 super became the go to round. You need enough power to activate the comps on open pistols which is why the velocity is high on it.

[ChicagoRonin70]

It's a competition round that was used prior to going to .38 super in a lot of open and competition guns. When the power factor was lowered the .38 super became the go to round. You need enough power to activate the comps on open pistols which is why the velocity is high on it.

I am happily Internet munching on all that good stuff about the Dillon. I'm interested in using it as a long distance round, because of how flat-shooting I am reading it is supposed to be.

 

But, being honest . . . new noise toys!

[Jeckler]

 

 

In any case, I already partially broke my New Year's resolution, which was no more new guns this year.

 

And I thought losing 5 pounds would be a difficult resolution. Can't imagine trying this one.

[ChicagoRonin70]

 

 

 

In any case, I already partially broke my New Year's resolution, which was no more new guns this year.

 

And I thought losing 5 pounds would be a difficult resolution. Can't imagine trying this one.

 

Actually, if you tie the two together, by putting your food money in the same pile as you do your gun fund, you'll either run out of money to eat, and thus lose weight, or choose sustenance over ballistics and not buy more guns.

 

Alas, I'm always trying to gain weight, so that wouldn't work for me.

[thobart]

I have shot these guns they shoot as flat as .38 super. No big surprise at that volocity. . Should be a fun gun but not sure I would want to run it without a comp on it.

[ChicagoRonin70]

I have shot these guns they shoot as flat as .38 super. No big surprise at that volocity. . Should be a fun gun but not sure I would want to run it without a comp on it.

Indeed, and that's why I jumped on the barrel with the ports that I came across. It might not be as dampening to the muzzle jump as KKM's barrel-end compensators, which are simply amazing, but I know several people who have shot Lone Wolf ported barrels and like them a lot.

 

Plus, for under $80, you can't beat that with any kind of stick.

[thobart]

You will have to try my .40 competition gun it is by far and away the flatest shooting gun I own. The 22 rounds to start is nice as well. Nothing says I love you like 22 rounds of .40 in my humble opinion.

[ChicagoRonin70]

You will have to try my .40 competition gun it is by far and away the flatest shooting gun I own. The 22 rounds to start is nice as well. Nothing says I love you like 22 rounds of .40 in my humble opinion.

What type of ammunition are you shooting in it? The fastest, flattest .40 S&W that I have found is Underwood's 135 grain Nosler load, which they say goes 1,442 fps out of the box in a 4.5" Glock 22 barrel. Out of my KKM 3.77" barrel, I still get over 1,400 fps with it. Are you hand-loading?

 

Incidentally, Underwood's 135 grain 10 mm coming out of my 5" compensated KKM is over 1,650 fps (a couple of them even flirted with 1,665), but I only had one box of 20 of that, so I didn't get to test it much beyond laughing hysterically at the ridiculous muzzle blast and having everyone in the range drift over to see what the H e ll I was shooting and pointing at the absurd numbers on the chrono.

 

I expect that the Underwood Dixons will be similar to that.

 

For a while, my range setup for my 10 mm was with 15-round G20 magazines with 5-round Arredondo extensions topped with X-grip magazine grip adapters, but the springs and feeding with those were so inconsistent and glitchy that I just went back to the straight 15-rounders with X-grips.

 

I would love to have a 20+ round 10 mm magazine to be able to shoot 10 mm/.40/9x25 mm all day, but alas, I haven't found one that's reliable.

 

I guess that's why I have my Kel-Tec PMR-30 with the 5" flash-reducer barrel. Shooting 31 rounds of 40-grain .22 magnum out of that at close to 1,500 fps in 8 seconds is a trip of its own absurd flavor.

 

Still, I need to get some of those 85–95 grain DoubleTaps and see what kind of craziness ensues with over 2,000 fps. That's eclipsing .22 TCM muzzle velocity.

[thobart]

My reloads running 180 grain either bayou or extreme. They are not a high velocity round the flatness comes from the gun for the most part, It cycles like a sewing machine. Here is an old picture of it:

 

http://i428.photobucket.com/albums/qq10/thobart/0CE72BC7-93C2-452F-A5BF-FD744D8AFE75-16499-000022776BD79E9C_zps660c7f3d.jpg

 

Here is my para .45

 

http://i428.photobucket.com/albums/qq10/thobart/573586D3-FE0D-4D68-B0A5-5AF189F623E1-16499-000022776788FDCC_zps98f169ea.jpg

[ChicagoRonin70]

My reloads running 180 grain either bayou or extreme. They are not a high velocity round the flatness comes from the gun for the most part, It cycles like a sewing machine. Here is an old picture of it:

 

 

Here is my para .45

 

 

That is a fine piece of shooting machinery, for sure!

[thobart]

I will be shooting it tonight at USPSA.

[vactor]

I will be shooting it tonight at USPSA.

 

ugh, when and where? i can never get a good handle on when and where to shoot in the chicago area (

[thobart]

Alpha range in Mchenry,

[ChicagoRonin70]

Update on my venture into 10 mm parent cartridge wildcat territory.

 

Since my Internet was down today, I had to go find other things to occupy my attention to. So, when my new barrel came this morning, I took two of my boxes of Underwood 9x25 Dillon, along with my other barrels for my G29 Short Frame and braved (or stupided, depending on your viewpoint) the cold to take a train, two buses, and a 20-minute walk to the nearest range (ain't living in Chicago grand for gun-owners).

 

I was able to compare the Dillon rounds out of the ported 4.6" Lone Wolf barrel to a range of the usual 10 mm I shoot from Underwood, specifically the 140 grain Xtreme Penetrators, plus some 155 and 165 grain Gold Dot loadings, all out of my 5" KKM compensated barrel, and just for fun some 220 grain hard cast lead out of my 4.7" KKM barrel.

 

Great Satan's Blazing Scrotum! Those Dillon rounds from Underwood out of the double ported barrel sound like grenades going off! At least as loud as any of the 10 mm rounds, even out of the compensated barrel. I'd wager they're popping at least as fast as the 135 grain Underwood 10 mms I wrote about shooting above. They also have equal or even less muzzle flip and recoil than anything I'm shooting out of the compensated KKM barrel, as well. Really flat shooting and accurate.

 

I will say that I'm glad I had my heavier recoil spring in the gun, which is the configuration when I shoot 10 mm (otherwise, I use a LaserMax guide rod laser with a .40 S&W KKM conversion barrel), because I can tell that it would have beat the snot out of my slide. I also would not want to fire this with a 10-round magazine from the G29 SF, even with the Pierce Grip Extensions I use on those. Then again, I don't shoot 10 mm with those, either. But in my 15-rounders with X-Grip extensions, it feels quite handleable.

 

I am going to love putting this through a chrono and seeing what kind of velocity it hits, but in comparison to the other loads I'm familiar with shooting, I can easily see this being well over 1,600 fps from the barrel I'm using for it.

 

I'm half glad and half sad that Underwood has no more of this caliber in stock right now, since I cleared them out, because I'd be definitely violating my ammo buying limits for the month stocking up on it so I could shoot more of it.

 

This is going to be trouble indeed.