Rob72 wrote: ↑Thu Dec 19, 2019 9:34 am
K-Texas wrote: ↑Wed Dec 18, 2019 2:22 pm
Rob72 wrote: ↑Wed Dec 18, 2019 9:38 am
K-Texas wrote: ↑Wed Dec 11, 2019 3:31 pm
I'm not a huge Glock fan, but I've owned a few. I am, however, impressed with the simplicity of this Model 44's design. One question remains concerning the energy of different .22 LR loads, and
if any change in spring weight will be required for rounds like the Stingers, etc? If Glock has them all covered with the unit supplied, that's certainly a +.
It is unlikely that the springs are able handle Hyper-velocity
and Standard as the OAL of a .22LR is nominally 0.985" and the 9mm is 0.984; therefore, the slide has to travel the same distance, and without a longer slide allowing the primary spring to bear the load of Standard velocity ammo, with extra travel length for the secondary spring to adequately buffer Hyper-velocity. Alternatively, they could shorten the secondary spring and barrel, and increase the weight of the secondary spring for higher pressure rounds, dicey at best. The fact that they have a sub-caliber mechanism that mirrors the full-size weapon is remarkable enough, assuming that it works (as does Advantage Arms, TacSol) with standard loads.
Another attraction is that it appears you're getting a standard G19 frame for ~$100 less than a G19, so it may be a more economical multi-caliber base for some folks.
Okay, I'll trust that you've checked the SAAMI spec for .22LR "nominal" length. You might want to check your numbers for 9 x 19mm. SAAMI Max OACL is still 1.169" while Max case-length is .754". I can't honestly say that I've checked to see if CCI still makes the Stinger, but I did notice that Aguila is making a load very similar. As far as cartridge geometry, I don't see that as an issue. And with the dual recoil spring set-up of the G44, seems to me that getting reliable function with a hyper .22 LR round would be as simple as adding spring weight, if one is required. Maybe I'm missing something here?
Both cartridges running right around 1" OAL. Regarding the question as to whether any spring weight change would be necessary for different loads, the answer is (most likely) yes. I listed reasons as to why that will (most likely) be the case.
Rob, 1" OACL is pretty short for a 9 x 19mm load. I load 124 & 147 gr. JHPs mostly, and my OACLs run 1.122"/28.5mm - 1.142"/29mm. The shortest length I recommend for someone using a 124 gr. JHP when no data exists for a particular bullet, or has to be loaded short because the barrel has a short chamber, is to start with SIERRA data for their 125 gr, JHP, or as loaded in the Lyman P & R III and their 49th edition manuals. They both use a short OACL of 1.075". That's a place to start because I consider either to be a worst-case-scenario because that particular bullet has a shank about as long as you'll find for a 124/125 gr. JHP. The bullets shank being the bearing surface engaging the rifling determines the amount of friction in the bore. Pressure for such loads can be reduced by using a longer OACL. But any bullet loaded for any pistol, should have it's own OACL determined for the particular pistol it will be fired from. Or, when loading for multiple pistols while you only want to use one single OACL, it will have to be loaded according to the pistol/barrel with the shortest chamber.
I don't deal in maybe or likely. With the 9 x 19mm having a SAAMI Max OACL of 1.169", and mostly for long FMJ bullets with slender profiles while the Max for case length is .754" while Lyman recommends .751" as their "Trim-to-length," Loads can range from just longer than case length up to Max OACL. Depending, of course, on the weight and shape of the bullet and whether or not it reliably functions.
You say "nominal" OACL for .22 LR is .985", so I have to ask where exactly did that length come from, specifically? Hopefully that isn't based solely on loads you have on hand. SAAMI OACLs range from minimum to maximum. Not nominally. But in any event, .985" is easily within the geometry window of the G19 in 9mm. And as I said before, for .22LR OACL, it is a non-issue so long as loads feed and eject reliably. That was Glock's job for the G44.
One of the merits of the dual recoil spring assembly is the broad range of loads they can handle. In this case, lighter loads would be the greater test since the slide must fully cycle against the weight of the springs. But we can't reliably state absolutes for the minimum or maximum velocity/weight range of the loads. Obviously, Glock has the numbers they feel most comfortable with, and a person could ask for that range, if so inclined. Otherwise, and without solid data for min to max loads, it's gonna be trial and error while the median for loads is gonna be standard .22 LR rounds. Anything else is speculation until proven.
But getting back to 9 x 19mm, the info I posted is found in any decent handloading manual. Hopefully, you will consult one in regard to 9 x 19mm.
Editing to add .22 LR Specs. You will find them here, and it's for .22 LR Match Ammo:
http://bulletin.accurateshooter.com/201 ... -diagrams/ The SAAMI site isn't working at the moment, but this is simply a reposting from SAAMI.
As you can see, the Spec calls for 1.000 - .050". That would put minimum spec at .950".
