38 Casull Glock

Discussion in 'Reloading' started by es 350, Nov 19, 2017.

  1. es 350

    es 350

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    SS30378 likes to experiment like a lot of handloaders and shooters like myself.

    Not long ago he contacted me about this idea/project he had in mind.
    Ream a 9mm conversion barrel for G20 to 38 Casull, which we refer to as the 38 Weatherby now because of its Weatherby
    style shoulder.
    20171119_190141.jpg

    He sent me his LWD long slide , 6" 9mm barrel now reamed to 38/45 along with a set of dies.

    After reaming/headspacing barrel I loaded a couple of test loads using power pistol . These loads were not hot at all and would not cycle the slide but showed very impressive accuracy at 25 yds.

    Did some load development today using Win. 296 powder under 125 xtp's.
    With absolutely no load data (that I could find) I started low and worked up as one should always do!

    With a case capacity somewhat close to 357 mag I some idea of where to start.
    I worked up to 20.5 gr of 296 for a velocity of 1876 fps/977 ft lb load.

    The muzzle rise of this load is more than a comparable load in a revolver mainly because of the lighter Glock platform.

    Will also be machining a muzzle brake for this barrel in very near future to help with muzzle rise and for the heavier bullets Steve will be shooting from his 38 WBY.

    I would be willing to bet this is the only such Glock in existence for now.... I may build one for myself.
    Dies are not on dealer shelves and at a premium price from RCBS custom shop. If I have time I may machine my own just to have the fastest (for now) caliber Glock !
    90 gr or lighter bullets would give a Glock rifle velocity and trajectory for a varmint rig.
    20171119_190119.jpg
     
  2. ss30378

    ss30378

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    Ebay is the only reason this project started lol...

    But I’m looking forward to this. Having a couple grains more capacity than the Dillon round and the wsm style case should make for some interesting numbers with the slow powders!
     

  3. Troy Mesa

    Troy Mesa

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    That is very impressive! Good luck on the project.
     
  4. 21Glock

    21Glock

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    Wow! That is some smokin round. I know the trajectory has to be pretty flat with bullet moving that fast.
    It looks a big 357 Sig case. Love the sharp shoulder on the case. I know it will be a real thumper. Interested to see what es350 excellent brakes will do to tame the recoil on this
    caliber.
     
  5. Max Hypicus

    Max Hypicus

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    Looking forward to the development of this cartridge in a Glock. I have thought about it for years. But here it is in reality. Very cool.
     
  6. TheSlowLane

    TheSlowLane

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    I'd like a 50 G.I. wildcat except starting with a 458 socom case. Or have Mr. Coonan design a G20 magazine that would feed 10mm magnum cases. I've been using trimmed 10mm mag cases and i prefer them now.
     
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  7. es 350

    es 350

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    20171202_183935.jpg

    20171202_183743.jpg

    Nice to see some interest in the 38/45 ,

    Here is a couple pics of the brake roughed out and fitted to barrel.
    As can be seen in pics barrel is threaded inside slide and will lockup on the outside of brake in end of slide, same as a cone comp on a 1911.
    Hopefully will be testing/ continuing load development by this weekend.
     
  8. TheSlowLane

    TheSlowLane

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  9. Benchrst

    Benchrst Ban Hamster

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    Subscribed.
     
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  10. Alabusa

    Alabusa

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    +1

    Sent from a mental institution
     
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  11. woodguy

    woodguy

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    Im interested. Now where to find a 9 mm barrel for my 41.
     
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  12. pgg00

    pgg00

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    That is a cool setup. Some impressive numbers.
     
  13. woodguy

    woodguy

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    Is it based on an acp case or win mag?
     
  14. ss30378

    ss30378

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    Based on the ACP case. It’s sized down in 2 steps, first to 400 corbon then to 38/45.
     
  15. Wyoming

    Wyoming

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    The 38/45 auto has been done years ago. Now if you could find you and old Grizzle 45 Mag and necked it down to 357?

    How much case length do you lose when you neck down 45 ACP brass? If you do you could make the length by use rife brass such as 308 and cutting it as long as you can and get it to fit pistol.

    You did say you like to experiment:supergrin:

    This reminds me how gunsmiths would take a big N frame Smith & Wesson revolver in 357 Magnum. Find an extra 357 cylinder and bore it out to the 357/44 Bains Davis. The reason I remember these old gun magazine articles? They were getting 1800+ fps with 158 jacketed bullets.
     
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  16. Cycletroll

    Cycletroll

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    Nice work guys! Be curious to see what she'll do with the 158 and 180gr XTP. With BC's of .206 and .230 respectively and great sectional density could be the ultimate handgun hunting round. I can easily get 1200fps out of the sig with 180 so maybe 1300-1350 with the 38 weatherby?

    Subscribed!
     
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  17. ss30378

    ss30378

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    Wyoming:
    I'll have to measure the cases when I get home but I know last time I measured the 38s they weren't much shorter than the standard 45 case.

    CT:
    Loading the 357sig long to 1.270" with 180gr cast wfn bullets I've surpassed 1450fps in a 6" g20 barrel with 800x. The 38wby should be very impressive but I believe 800x will be too fast with it so ill have to step to the slower powders to wring out what's possible.
     
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  18. njl

    njl Crusty Member

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    It looks like you’ve pretty much duplicated .30 carbine ballistics in a pistol.
     
  19. BOOSTED12A

    BOOSTED12A

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  20. Borg Warner

    Borg Warner Free Full Clip!

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    "Now if you could find you and old Grizzly 45 Mag and necked it down to 357?"

    That would be the L.A.R .357/.45 GWM (Grizzly Wildey Magnum). It is very similar to the 40 super except that the smaller lighter 357 bullets will register higher numbers on the chronograph which impresses a lot of people.

    I was interested in the 40 super for a while until I heard they had feeding problems with G21 magazines because the bottleneck cases tend to do a nose dive. the 40 super us the 45 win mag case necked down to 10mm. Dies are available but they ar eexpensive, but not as expensive as custom dies for a wildcat cartridge

    https://en.wikipedia.org/wiki/LAR_Grizzly_Win_Mag

    [​IMG]
     
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