1. floyd harper on March 2, 2023 at 2:32 am

    Both the .357 and 40 S&W will fit just fine into the stock 10mm mag. You can actually shoot the 40 without a barrel change, but Glock doesn’t recommend it.

  2. Don Le on March 2, 2023 at 2:33 am

    What this says "stock glock 20 is too short of barrel for 10mm", I have tested in my glock M40 with many ammunition types no changes from stock to 6" LWD & kkm (more accuracy no both compared to glock barrel), then I did the right thing bought a KKM 7" for the Glock 40 and speed stayed more or less the same on factory ammo but reloads (do not shoot reloads in stock glock, the rifling is that shit they do) and I can increase speed to impressive results, and then changed the spring as the reloads were slamming the slide back, Yes all well with in tolerance of the chamber pressures..

  3. Mason W. on March 2, 2023 at 2:33 am

    LMAO every single one of those shots ended up in some random far away place.

  4. ahallada on March 2, 2023 at 2:33 am

    10mm ammo is more available than .40 cal right now and depending where you buy it they are about the same price now. I do have a LW 10mm to .40 cal conversion barrel if the need ever arises.

  5. Kenneth Litten on March 2, 2023 at 2:34 am

    Good job. Just think you need a back stop though with nearly every round bouncing of thoes rocks

  6. Estebahn G on March 2, 2023 at 2:36 am

    Actual barrel length ! Not including the chamber is what you have .

  7. Gregg Wonder on March 2, 2023 at 2:36 am

    👍Thks. I have that 6"barl. Also 40,357 Sig. The G20 gives you three calibers for under a grand. Hard to beat that plus all high cap using same mags. Buy a Glock 20!🇺🇸✌😁

  8. J&N Midwest Sales on March 2, 2023 at 2:36 am

    10mm is the best mm 😀

  9. TC Swag on March 2, 2023 at 2:38 am

    Maybe I missed it but were you using +p jhp ammo ? Underwood

  10. Tom Tolentino on March 2, 2023 at 2:39 am

    Substantially impressive😎just recently purchased a lone Wolfe Barrel for my 1st Gen Glock 17 to achieve better velocities and range on this iconic classic firearm. Still shoot just as good, as the first time, now even better😎👍cheers & thanks for posting 👍

  11. james jackson on March 2, 2023 at 2:40 am

    only problem i see . the rifling in the lonwolf would make the fps higher alone compared to the rifling of the stock glock barrel. compare the stock 4.6 against a 4.6 lonewolf …that would be more accurate than adding 1.6 more inches to the barrel alone.

  12. tonyad95 on March 2, 2023 at 2:41 am

    Can anyone please tell me the model number for this barrel. When i go to their website I seem to find only Glock 21 barrels. I need one for Glock 20.

  13. Hans Gruber on March 2, 2023 at 2:42 am

    Man I give you credit for using NUMBERS to support your presentation!  So many YouTubers use WORD SALAD they have copied from some other "expert" to support their position which is pure-D BS!  You took the ammo, the barrels and shot the numbers and THAT is what COUNTS!  THANK YOU for bringing NUMBERS to the plate….perhaps all the other YouTube experts could learn something from you! 

  14. bubba55l on March 2, 2023 at 2:43 am

    It sounded like Clark Kent was in the background.

  15. Peter Martin on March 2, 2023 at 2:43 am

    Trash the 10mm and get the 357SIG!!

  16. ObjectableApparatus on March 2, 2023 at 2:46 am

    holy shit that sounds amazing, wonder what it’d sound like with a 10 inch barrel, 235 gr full power load with maximum rifling

  17. UndergradPigeon on March 2, 2023 at 2:47 am

    I kind of agree but .40 could make for some cheaper practice ammo or in some kind of ridiculous shtf teotwaki scenario, you know if that’s your thing. Haha great video man

  18. Stefano Dogg on March 2, 2023 at 2:47 am

    Are you sure of what is just over that hill? I’m hearing serious ricochets

  19. Doug Catlett on March 2, 2023 at 2:48 am

    Very well done video. I did the exact same test with my G20 with the same two barrels as you and my results were very similar to yours but I used the Sig Sauer Elite ammo in 180 gr. JHP. My avg. with the stock 4.6" barrel is 1265 fps(640 ft-lbs) and with the 6.02" LWD barrel I avg. 1343 fps(720 ft-lbs). 78 fps difference and 80 ft-lbs difference between the two barrels. I use my G20 for hunting and, to me, that’s enough muzzle energy difference to warrant buying the extended barrel.

  20. Blue Patch1413 on March 2, 2023 at 2:49 am

    Very good, thanks

  21. Mark Huston on March 2, 2023 at 2:49 am

    Hows the reliability with the lone wolf?

  22. Courageous Lion on March 2, 2023 at 2:52 am

    Your CHRONOGRAPHING ammo THROUGH two different length barrels. God I hate Lone Wolfs logo! That was quite a spread on that over priced Underwood ammo!  Here is my load that uses a 155 JHP out of a stock Glock 20 barrel: 10MM Glock 20   with a   4.6′ factory barrel   firing  .40  Montana Gold 155 JHP  withe a  1.23 OAL using   CCI Magnum Large Pistol behind  Hodgdon  Long Shot    11.6 grains.   1493 FPS average out of 12 rounds   Standard deviation of   21    767 pounds  KE    This load is using CCI 350 magnum primers. 10 extracted fine after slipping back in barrel with no obvious pressure signs. Two showed very faint Glock "smileys" with the stock Glock barrel telling me these are on the edge. I think I can hit 1500+ with a Bar Sto fully supported barrel. I was also using PPU 1x fired brass and maybe some of it is weaker at the bottom than others. DO NOT USE THIS LOAD IN YOUR 10MM WITHOUT WORKING UP TO IT. Start at 10 grains and work up.

  23. The XO of the RO on March 2, 2023 at 2:53 am

     I dont see a point in 9×25. Why not buy an AK47.62 pistol. Cheaper and 400 more fps pushing a similar weight bullet. .

  24. rumneyjoe on March 2, 2023 at 2:54 am

    Kobe beef burger anyone?

  25. Liam B on March 2, 2023 at 2:55 am

    It worked!

  26. pjTheNinja on March 2, 2023 at 2:58 am

    U can here his bullets ricocheting

  27. jhanks2012 on March 2, 2023 at 2:59 am

    something special about a 6-incher. not too big, not too small

  28. Mark Telep on March 2, 2023 at 2:59 am

    I have the same lone wolf barrel for my Glock 20. Very informative to me–many thanks!!

  29. Po Izzy on March 2, 2023 at 3:00 am

    Uh, why are you shooting into rocks? Ricochet much!?

  30. Demo Crat on March 2, 2023 at 3:01 am

    I have a Glock 27 Gen 4 with a 9mm Lone Wolf conversion barrel. There is no difference in chamber support between the two. There may have been in 1st and 2nd generation Glocks, but those days are gone. Glock does however have a slightly larger chamber for more dependable chambering which swells the cases a bit more, but again no problem with reloading so-called "Glocked Brass." The resizing dies and factory crimp dies bring them all back to specs. They will chamber in ANY .40 caliber.

  31. John Hoffman on March 2, 2023 at 3:03 am

    That was so interesting. So 1.6" increase in barrel length allows 80 feet/sec increase in bullet speed. That is one heck of a dangerous round. Thanks for doing this and answering my questions for me.

  32. floyd harper on March 2, 2023 at 3:04 am

    You have to use the stock Glock 20 Mag

  33. harley davidson on March 2, 2023 at 3:06 am


  34. TC Swag on March 2, 2023 at 3:07 am

    Gotta love/hate relationship with that particular sound shit Zipping by from your 6 , rifles got that higher pitch lol anyways Nice vid I was contemplating ordering one for my G20 sf . Thank you for the upload .

  35. UndergradPigeon on March 2, 2023 at 3:12 am

    Wow that really didn’t add as much velocity as I expected

  36. William Knight on March 2, 2023 at 3:13 am


  37. k luper on March 2, 2023 at 3:14 am

    how is the accuracy on the 6” Lone wolf? to the stock? want one for hunting Deer?

  38. M on March 2, 2023 at 3:14 am

    The FBI made that suggestion lol but I’m with you on this one.

  39. b Mc on March 2, 2023 at 3:15 am

    Nice video. Thank you. This is the 5th video i looked at before getting any real numbers.

  40. TOBORE8THMAN on March 2, 2023 at 3:17 am

    For comparison purposes:  I recently chronograph Underwood 180 grain WFNGC in .357 Magnum (part #720) w/ advertised velocity of 1400 FPS (6" barrel revolver).  My Ruger Blackhawk 4.6" barrel ran 1352, 1320 and 1356 FPS for an average of 1342 FPS.  My Ruger 77/.357 Magnum Rifle ran these rounds at an average of 1800 fps.  Thanks for the chronograph video.  I always enjoy them in any caliber. 

  41. george rome on March 2, 2023 at 3:17 am

    I found some 10mm/.40 200 grain Gold Dots HP I purchased 2000 pulled Bullets from RMR, I know I can get speeds up 1200 FPS. I have not received them yet through the mail buy love to compare them to your 10MM test. Has anyone heard of 200 grain Gold dots bonded Speer hp in .40/10mm? I did not think they existed but they do. I can only feel lucky to bring back full Power Norma Ballistics in 10MM. I have to dial in the best performance but I believe I can achieve my goal.

  42. jamesdewer on March 2, 2023 at 3:17 am

    Insane in the membrane, I have a G20 but went with the Stormywaters 5.3" ported tube. There’s a several hundred fps difference. Especially when using the pathetic down loaded factory loads. My most potent load is 10.7 gr of Blu-Dot with a 155xtp. I had it out on my sailboat line- fishing off the coast. I was dropping sea lions with a single shot. Sea Lion goes after my catch, sea lion dies. They eventually adapted to the point of where I was able to hit. If they got to my fish outside of 30 yds they were safe. Then I started bringing my Keltec 9mm and again they evolved to go, no-go. Suppose my Mauser M18 will be seeing duty soon. The big males barely flinch when hit they sort of ignore the insult. A good well placed shot in rolling seas and they sort of roll over belly up.

  43. GetMeThere1 on March 2, 2023 at 3:17 am

    Excellent video. I’ve just got a couple of long slides from lone wolf, and the 6" (and 9", LOL) barrels — in both 10mm and 9×25 Dillon. I’ll be doing the same tests, but I was curious to see if anyone had played around with this on youtube (hickok45 has, but it didn’t use the 6" barrel).

  44. Victor Weis on March 2, 2023 at 3:20 am

    Lone Wolf also makes a 9" barrel for the G20. I bet you’d get even higher velocities with it, especially with +P ammo. Would make a hell of a hunting gun.

  45. Larry Tischler on March 2, 2023 at 3:22 am

    Were the 200 grain Gold Dots a misprint, or did you actually receive them? Speer made 200 grain TMJ’s for a while and I loaded some for a .40 with Accurate #9 but the combo resulted in bulged cases BEFORE firing. Accurate dropped the load from its reloading manual. It flattened primers in my USP40 just a little over the starting load.

  46. J.D. Bowen on March 2, 2023 at 3:24 am

    The G-20 barrel factory, is a superior barrel to the garbage lone crap and the others. More velocity, gas check, and accuracy. Belive it. Quit buying garage produced crap just because it comes from a "small quanities target manufacturer". The Glock barrel will always prevail

  47. Alberto Gorrin on March 2, 2023 at 3:25 am

    Thanks for the info its a cool barrel, to bad about the mk mouse logo on an all business 10mm barrel.

  48. baby girl on March 2, 2023 at 3:25 am

    how much is it

  49. Jonathan Byron on March 2, 2023 at 3:28 am

    New Mexico? Looks like by white sands?

  50. george rome on March 2, 2023 at 3:29 am

    Fully supported Barrel by lone wolf will not give you case buldge if you reload

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