Joined the 10mm (and Glock) crowd.

[osteodoc08]

Sold off a Smith revolver I rarely shot and put the funds towards a Glock 20 SF. The idea of having 357 Mag ballistics with 15 rounds, less weight, auto format did me in. I've eyed them for years. Wanted a Gen 4, but I've heard mixed reviews so pulled the trigger on the Gen 3. The SF model feels oh so good in the hand. It will now be my woods and hiking gun where I previously carried a 4" 686 or Ruger BH in 41 Mag. After a few months look for a thorough eval of gun and caliber. I've got 3 Smith M&P autos and had an XD in the past for me to compare to. Maybe (or maybe not) ill be a glock convert. We shall see.

 

[Torian]

I think the 10mm slightly edges out the 357 mag. I own both...and with the right handloads the 10mm can really shine. Really closer to a milder .41 magnum load IMO.

Enjoy your glock. I went to the dark side with my Elite Match.

 

[Osageid]

You will have to try out underwood ammo, they make some great stuff!


Sent from my iPad using Tapatalk HD

 

[osteodoc08]

Mild 41 ballistics for sure. But no where near true 41 mag stuff. But I reload so ill have to get some components to get this thing to really shine.

Now for the age old question, hard cast or not.....just kidding guys. Lets keep Pandora's box closed on that one.

 

[Thompsoncustom]

you could always upgrade your glock to a .40 super and it would get you a little closer to a real .41 mag but still not all the way there.

Underwood's 40 super:

Caliber: 40 Super
Bullet Weight: 135 Grains
Bullet Style: Nosler Jacketed Hollow Point
Case Type: Brass

Ballistics Information:
Muzzle Velocity: 1775 fps
Muzzle Energy: 945 ft. lbs.

 

[wow6599]

Welcome to the club.

I am on my second Gen 3 20SF. I have LW 40, 357 and 10mm barrels for it - just need to add a 9x25 barrel and I'm set. I use it anytime I'm in the woods for a walk, or hunting. I have full confidence in this load from DT stopping any 4 legged threat......or 2 legged meth-head.

Caliber : 10mm

Bullet : 200gr Wide Flat Nose Gas Check Hardcast

Ballistics : 1300fps/ 750 ft./lbs. - Glock 20
1105fps / 542 ft lbs 100yds Glock 20
Glock 29 - 1240fps

 

[osteodoc08]

Thompsoncustom,

40 super was new to me. Definitely impressive velocity with that 135 gr bullet, however, I'd rather have heavy bullet at moderate speed. Lightweight high speed means shallow penetration. Even my 40 hand cast reloads use a 180gr cast at moderate high velocity. This is what kept me from the 357 Sig. On paper it's impressive. Many compare it to the 357 Mag, but its only comparable with light bullets. Start comparing a true heavy load and the 357 Sig falls flat and the 357 Mag really shines.

I'm a huge 41 Mag fan and load up 250-270gr GC designs at a little over 1300 FPS. That'll work for anything ill encounter.

Ill be interested to see what the 10mm can do with 180+ grain bullets.

I love the hodgdon load site cause it allows me a quick glance comparison grain for grain by printing off the load data.

 

[horsemen61]

Pics please

 

[Gtscotty]

I don't see the point in that .40 super load, I got over 1600 fps with Underwood's 135 gr 10mm load, and even that is really too fast for that bullet unless you're just interested in 'splodin things.

I had good results with 180 gr bullets over Longshot (9.3 grs I believe). I was in the mid to high 1300's out of a lone wolf 6" barrel with that load and not really pushing things. The 180gr Hornady xtp is supposed to be a great hunting bullet for the 10mm.

 

[Thompsoncustom]

Well here's some more info on .40 super loads and ya it's new to me to and I know little to nothing about it. Just copy and pasting from underwood's site. After I bought my G17 I learned about it and kind of what this power house now.

Lightest to heaviest:

Technical Information
Caliber: 40 Super
Bullet Weight: 135 Grains
Bullet Style: Nosler Jacketed Hollow Point
Case Type: Brass

Ballistics Information:
Muzzle Velocity: 1775 fps
Muzzle Energy: 945 ft. lbs.

Caliber: 40 Super
Bullet Weight: 165 Grains
Bullet Style: Speer Bonded Jacketed Hollow Point
Case Type: Brass

Ballistics Information:
Muzzle Velocity: 1600 fps
Muzzle Energy: 938 ft. lbs.

Caliber: 40 Super
Bullet Weight: 200 Grains
Bullet Style: Jacketed Hollow Point
Case Type: Brass

Ballistics Information:
Muzzle Velocity: 1400 fps
Muzzle Energy: 871 ft. lbs.

Caliber: 40 Super
Bullet Weight: 220 Grains
Bullet Style: Hard Cast Flat Nose
Case Type: Brass

Ballistics Information:
Muzzle Velocity: 1350 fps
Muzzle Energy: 891 ft. lbs.


As far as 10mm goes you should be able to push a 180gr 1300fps which is still really good and I don't know if I would trade the 10mm for a bottle necked cartridge or not.

 

[osteodoc08]

Hmmm. Now that's more impressive. I may have to look into this. Who makes the conversion? Cost? Who makes dies and brass?

 

[Torian]

I have zero experience with any "super" calibers. You've got to be dealing with some SERIOUS pressures to pump out that velocity

 

[tallpaul]

I bought into my model 20 3rd gen last summer with the same basic thoughts of a woods/huntin gun. with Smith 29's and such approaching 800-1000 the thoughts of beatin on one as a woods gun does not appeal to me as much as the 450.00 Glock I got second hand like new in box...

I got it and some mags right before the madness but still have not shot it enough. The preliminary results have been great and I have a dillon set up ready to go and some starline brass ready t go.

I might have to try a 1911 in 10mm one of these days as much as I like the Glock.

 

[ku4hx]

I own two 10mm semi autos and they do a very credible job, especially in true full power mode. If I need more power in a handgun I go to one of my .44 Magnums or 454 Casulls. If I need more than that I get an appropriate rifle or shotgun.

Handguns are great. But when the threat, or potential threat, gets high enough it's time to bring out the big guns and for me that's a shoulder weapon.

 

[Thompsoncustom]

Well the drop in barrel is about 125 new from lone wolf problem is it's for the G21. The 40 super is a 45 win mag brass sized/cut down for 40 super so you need to start with a .45 not a 10mm to do the conversion.



RCBS and Redding both carry dies for .40 super not sure who else does.

Underwood doesn't offer a 180gr in .40 super tho according to his number it would do 1500FPS.

 

[TexAg]

Don't most of the .40 caliber bullets have trouble performing well when pushed to upper 10mm speeds? Would the 40 Super just exacerbate that? Extreme expansion at the cost of penetration.

 

[Queen_of_Thunder]

Picked up a G20 in January but haven't fired it yet. Ammo. I can get my hands on a couple boxes of the PPU 10 mm and I was wondering how good it was.

 

[osteodoc08]

PPU Prvi Partizan is ammo made in Serbia. It's fine for what it is. Blasting ammo. I wouldn't be depending my life on it. I picked up 200 rounds of Remington ammo when I got mine. Hoping to run through it today.

 

[osteodoc08]

Yes, most poorly constructed bullets fail at higher speed. As soon as some appropriate bullets are available, I get them and reload.

 

[Torian]

Don't most of the .40 caliber bullets have trouble performing well when pushed to upper 10mm speeds? Would the 40 Super just exacerbate that? Extreme expansion at the cost of penetration.

Yep. Underwood uses good bullets (XTPs and Gold Dots), and neither performed well when pushed to the higher velocities.

If I recall correctly, the 180 grain at 1300 seemed to be a good sweet spot according to his testing.

 

[Thompsoncustom]

Yep. Underwood uses good bullets (XTPs and Gold Dots), and neither performed well when pushed to the higher velocities.

now I only reload for 9mm but I disagree with the above. XTP's do fail at higher speeds but the gold dots being a bonded bullet hold together well I've push a 115gr to 1400fps and they all held together, but when it comes to 10mm and 40 super I have no idea.

I've seen .45 super in 180gr/1300fps and 230gr/1100fps shot with the gold dots and they also held together just fine.

 

[TexAg]

It's not so much a question of holding together, it's massive expansion that slows the bullet down and limits penetration.

 

[Thompsoncustom]

Indeed the Gold dots open up very nicely, on the other hand if you want a HP that doesn't over expand the PDX1 can be push to 1400fps with any over expansion they almost look like a meteorite or tear drop with hooks, down side is they don't sell the PDX1 and pulling the bullets to reload them is not cost effective.

 

[Torian]

Al,

I was referring specifically to the 10mm underwood velocities, which are usually at the more extreme end of the handloading area. All of my handloads from him use either the XTP or gold dot. Maybe one or two boxes has noslers (nonbonded).

His 135 grain load for the 10mm is clocked at 1600 fps. At 1400 fps, I would suspect the bullet to be a better performer.

Check out the link below on how the 180 grain gold dot performs when pushed (gold dot is still one of my favorite rounds):

http://www.youtube.com/watch?v=sl_n_miLfbY&list=PL04F5D87436EEDCA8&index=1

Hornady's 180 grain XTP loading is running at 1190 fps. My guess is they certainly could push it harder if they wanted too...but maybe they feel optimum bullet expansion should be balanced against higher velocities? Who knows...I'm no expert.

http://www.youtube.com/watch?v=8X6vNZTbF7s

 

[jmr40]

Mild 41 ballistics for sure. But no where near true 41 mag stuff. But I reload so ill have to get some components to get this thing to really shine.

Closer to 41 and 44 mag than it gets credit for. If you consider overall size. My 4 3/4" G-20 gets a chronoed 1315 fps with Double Tap 200 gr ammo. My 3" 629 will just barely break 1150 fps with 240 gr ammo. Yea, the 44 mag wins, but not by nearly as much as most think. Now from a 6" or longer barrel a 41 or 44 mag is in a different league. But my G-20 is 3/4 lbs lighter and 1" shorter than the 3" version.

This 44 is slightly more powerful, but I'll give up that tiny increase for nearly 3X more ammo and a lighter more compact gun.