Forums / Gun Discussion / Glock 20 conversion to 9x25 Dillon

6 years 6 weeks ago, 5:05 PM

rmgunsmith

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Converted my Glock 20 10MM to a Glock 9x25 Dillon. Double Tap supplied the Lone Wolf stainless drop in fit barrel. I also installed a Sprinco recoil system to absorb the shock of this hi powered cartridge.

I would recommend Double Tap for both 10MM and 9x25 supplies, including barrels and ammo. With the high price of commercial ammo, Double Tap sells 50 round boxes for reasonable prices.

Has anyone experienced shooting the 9x25 Dillon cartridge or converted their Glock to 9x25 Dillon?

6 years 6 weeks ago, 5:38 PM

Reaper308

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g20 conversion

nope. what kind of mag do you use?

"Proelium Comminus Auctoritate" "Sometimes the light at the end of the tunnel is a muzzle flash."
6 years 6 weeks ago, 6:06 PM

rmgunsmith

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Magazine

I used the Glock 20 factory magazines since the 9x25 Dillon is a 10mm case necked down to a 9mm bullet.

6 years 6 weeks ago, 6:10 PM

Reaper308

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glock conversion

got it. i got a 10mm conv. barrel for my g21sf, and both a .357sig, and 9mm barrel for my g23. have the same for one of my sigs.
how are the ballistics on the 9x25 vs. the 10mm? is it pretty similar to a .357sig vs. .40?

"Proelium Comminus Auctoritate" "Sometimes the light at the end of the tunnel is a muzzle flash."
6 years 6 weeks ago, 6:16 PM

rmgunsmith

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9x25 ballistics

Caliber : 9X25

Bullet : 125gr. Speer Gold Dot JHP

Ballistics : 1700fps / 803 ft.lbs

Quite a bit faster and slight more energy than 10mm.

3 years 48 weeks ago, 12:40 PM

Rio Grande Vall...

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9x25

I have a Glock 31c and I have a 29 round Hi Cap magazine marked 40S&W that I use with .357sig in my Glock 31c. Would I be able to convert to the 9x25 or is the necked down 10mm to .357sig with the flat nosed bullet same or close to 9x25? will check back.

Average Citizen
3 years 48 weeks ago, 5:59 PM

Reaper308

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rio grande

I'm confused with the question. Are you asking if the 31 can be converted to 9x25? what does the .40/.357 mag have to do with it?

"Proelium Comminus Auctoritate" "Sometimes the light at the end of the tunnel is a muzzle flash."
3 years 47 weeks ago, 10:32 PM

Rio Grande Vall...

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31 to 9x25

On the Mags it is only an observation. I wonder what I can do to my Glock. What will I need to convert to 9x25. Or to 40s&w and it is a toss up so if only the barrel needs to change on the 40 I already have mags for them.

Average Citizen
3 years 48 weeks ago, 9:31 AM

rmgunsmith

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Glock conversions

The 9x25 Dillon is a 10MM necked down to a 9mm. The 357 Sig is a 40 Smith & Wesson necked down to a 9MM. Because both of the cartridges cases are .400 diameter, they will work in the Glock 20. They use the Glock 20 magazines and all you need for the conversion is barrels. You may also shoot 40 Smith & Wesson with a conversion barrel too.

3 years 48 weeks ago, 9:43 AM

rmgunsmith

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As a follow up to my other posts, by replacing the slide with a Glock 21 complete slide you can convert your Glock 20 from 10mm to 45 ACP. Then all you need is a Glock 21 magazine which holds 13 rounds.

3 years 48 weeks ago, 2:23 PM

luckybychoice

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hows expansion

on the 9x25 compare to 10mm,i don't have a 10 mm but i have been looking at them,is the 9x25 more affordable ammo than the 10mm? I know its a lot of questions i can look it up.

i tried being reasonable,i didn't like it, NRA LIFE MEMBER,USMC VETERAN
3 years 48 weeks ago, 2:48 PM

rmgunsmith

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9x25 versus 10mm

The 9x25 is a hot rod 9mm round with Double tap 95 grain JHP @ 1995fps / 881 ft. lbs in a 6" Lone Wolf bbl. That velocity is approaching rifle ballistics. Since the 9x25 Dillon is not a common caliber it is more expensive than 10mm.

Double Tap ammo has a 200 grain Nosler 10mm at 1250 FPS which exceeds the old Norma loading.

If I had to carry one for the woods it would be the 200 grain 10mm.

3 years 48 weeks ago, 3:47 PM

Reaper308

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10mm

thats my woods gun... Double Tap 200 gr. hardcast. They say its 1300fps from a 4.6" bbl. Their 165 gr. JHP's that I keep loaded in the house are advertised as 1400fps

http://www.gunslot.com/pictures/you-10mm-haters

"Proelium Comminus Auctoritate" "Sometimes the light at the end of the tunnel is a muzzle flash."
3 years 47 weeks ago, 1:12 PM

rmgunsmith

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Glock 31 conversion

The 357 Sig is a 40 S&W case necked down to a 9mm bullet. Based on the cartridge case, you may be able to convert your Glock 31 to 40 S&W but not 9x25 Dillon.

3 years 47 weeks ago, 4:26 PM

TXLUCKYGUY

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9x25D

I've been shooting 9x25D for years (6" DT Barsto tube on a stock G20). It's a helluva cartridge; can make 2000fps with the right loads. VERY noisy, flat-shooting, and capable of excellent barrier penetration with the right loads.

Issues:
1. 95 and 90gr pills, designed mainly for use in .380ACP, suffer accuracy problems in my 9x25D. The bullet consistently impacts right of point of aim; this is due to the small bearing surface/barrel twist combo.

2. 9mm/.380 bullets are not typically designed to perform above 1500fps, and some designs will fragment or fail rather than expanding/penetrating reliably. I ran the DT 115gr GDHP 9x25D in gel at an ATK lab, and the bullet expanded and penetrated well....the ATK was surprised it even held together at 1801fps. 'Rifle ballistics' are only worth a damn if the bullet is designed to and does indeed perform like a rifle bullet.

Thumbs up in general for McNett at DT....I haven't bought anything from him in a few years, but he custom-loaded 10mm duty and practice ammo for me to the tune of 5000rds. That stuff, and everything else I've ever used from him performed as advertised.

3 years 47 weeks ago, 6:56 PM

rmgunsmith

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9x25 Dillon

With my Glock 20, Lone Wolf 6" ported barrel and a Sprinco guide rod assembly, the 9x25 shoots pretty mild. I like McNett's 125 grain Gold dot JHP @ 1695 FPS / 6" barrel. The 125 grain bullets will withstand the higher velocity. These would be a good defensive round for sure.

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