Glock 20SF Longslide

[sargents1]

Hello beautiful. I got the goodies this week. Still waiting on the LWD recoil spring and guide rod.
This is a LWD long slide, 6.63 in threaded barrel on a g20sf.









I will try to follow up with a range report in a week or two if the weather cooperates.

 

[zerobarrier]

I'm not a glock fan, but that one looks pretty nice.

 

[JTQ]

It should be fun trying to find a holster.

 

[Onmilo]

I have a G40 MOS on pre order.
Patiently waiting
Patiently waiting,,,,
Remain Calm....

 

[sargents1]

It should be fun trying to find a holster.

The BH Serpa I have fits it fine. The barrel does hang down out of the holster, but that is to be expected.

Plus, I have been toying with the idea of buying a DIY Kydex Holster kit. Those look relatively easy to put together...

 

[[email protected]]

Kydex is easy to work with so you shouldnt have an issue. Did you use the factory slide parts, or did you get an assembled slide? Will the factory recoil spring and guide rod not work? It looks good.

 

[sargents1]

The weather finally cooperated and I got out to the range.

I brought three handloads with me to test out

Hornady 155gr XTPs over 800X
Hornady 200gr XTPs over AA#9
Magtech 180gr FMJ over Alliant 2400

I have never used 800X before because the flakes are so coarse that you need to hand measure the charges. I usually load using my Dillon SDB press, so 800x usually gets overlooked.

- For the 155gr loads, I made up series of charges starting at 0.5gr under max and working up to 0.2gr over max. All data came from the Hornady manual, so look there for specific charges.
- The 200gr Hornady XTP was AA#9 at 0.2gr under Max. I did not mess with this charge, I just loaded a batch up that charge and called it good. I have had good results with AA#9 in the past using my std length barrel and I expected good things from this.
- The Magtech 180gr fmj was on top of a charge 2400 that was 0.2gr under max. This was just to see how 2400 works with 10mm. I have used 2400 in the past with my 45 Colt and it works ok for that.

Here is a sample of the data.

155gr Horn XTP at 0.5gr under max: 1550 / 1582 / 1522 / 1568 / 1560 Avg = 1556ft/s
Yeah, 1556ft/s Avg from a half a grain under max. My eyes just about bugged out when I saw these #s.

Next up was the same 155gr XTP over a charge that was 0.2gr under max:
1638 / 1644 / 1651 / 1581 , avg = 1629 ft/s
(Giggling at this point)

155gr XTP @ Max charge of 800X
1669 / 1603 / 1597 / 1672, avg = 1635 ft/s

I was just about hooting and hollering at this point. I kept wondering if I was going to break 1700ft/s. In the end It was just shy of that, but not by much. Going by the Avg velocity, that max charge of 800x is running about 920ft-lb at the muzzle .

I get goose bumps looking at that number. I'm not even sure if an XTP will hold together at that speed when it hits. In fact I am pretty sure it wont, but Damnn! That's Fast!

I did chrono one of the +0.2gr over max loads, but I was only able to get one of those to fire in the new Longslide setup. I was having trouble getting consistent ignition because I had loaded these with WLP primers and they are apparently harder than some others. Also, the striker that came with my LW Longslide seems to not hit as hard as the OEM Glock striker. Anyway, one of the over-max loads did fire and it ran 1630ft/s. I took the fact that I couldnt get the +p loads to fire as a sign-from-on-high and quit while i was ahead.

Other data from that day:
200gr Horn XTP over AA#9
1287 / 1311 / 1307 / 1303 / 1299 / 1305 / 1300, avg = 1302ft/s [753 ft-lb]
This load was very consistent and gave really good velocity. This would make a great hunting load. Very pleased, especially because it is not a Max charge.

Last up was the Magtech 180's over 2400. This load was kind of "meh". Its not especially fast, I have pushed this same bullet faster from a stock 4.6 in barrel using Blue Dot and AA#9.
1225 / 1225 / 1136 / 1212 / 1223, Avg= 1204 ft/s [579 ft-lb]

I did remember to snap a picture of the Chrono after blasting one of the 800X loads over it


This is one of the pieces of brass (New Starline nickle-plated) after launching a 155gr bullet at warp speed. Flawless. No Smilie-face, no bulge. Just good used brass.



And here she is, the long-slide Blaster of Doom.


Suffice to say, I am really pleased with this setup and I will be using more 800X in the future.

 

[sargents1]

Kydex is easy to work with so you shouldnt have an issue. Did you use the factory slide parts, or did you get an assembled slide? Will the factory recoil spring and guide rod not work? It looks good.

To answer your question, no I did not use factory slide parts. I bought the Lone Wolf slide competion Kit. It cost about a hundred bucks and has all the little picky bits needed to make a complete slide. Its kind of expensive for the silly little packet of parts you get, but it is probably cheaper than buying all those parts separately and paying retail for them. It all goes together easily enough with the exception of the striker channel liner. Its this little plastic sleeve that goes in the the striker channel. The striker assembly rides inside it and so far as I can see its just a cheap plastic tube. You need a 12$ tool (basically a steel dowel with a step machined into it) in order to assemble it.

Anyway, putting a Glock slide together is simple enough. My one complaint is that the LW Slide with the LW Completion kit seems to have a wimpy striker spring. I am not getting consistent ignition with all primers.
CCI primers = Ok.
Winchester WLP = no bueno.

I bet an OEM Striker spring will fix it, but really, comon LW, use a spring with a little more heft.

The factory guide rod could work, but there is a plastic washer that is needed to space the guide rod off the barrel. Longer barrel = interference with the std guide rod. The plastic spacer gives you something to contact the barrel that has some give (unlike the LW stainless Guiderod). Honestly, I cant give you a thoughtful explanation of why the LW plastic spacer is needed, but It definitely will give you issues if you run the stock guiderod or an aftermarket guide rod sans spacer. The whole thing fetches up when you rack the slide back.

The nice thing about this setup is that it is relatively cheap, its easy to put together and it runs (once you have the right parts), its also easy to put back to stock.

BTW, if you plan on using the gun for Serious Purposes (Read: Self Defense), use the Stock barrel/slide/parts. Those are 100% reliable.

 

[Ex]

800X, regardless of it's metering, is an exceptional powder. In the highest end of velocity for many rounds and for most, lower in the pressure spike!

I build occasional small batches of 10mm special purpose rounds with this and put them aside for that "rainy day".

 

[breacher]

Have you tried Hodgdon Longshot with your 10mm?

I averaged about 1510 fps with 135gr Noslers in 40 cal outta my Glock 35 with those. I think it was 11.0 gr of LS, which is well under book max for that bullet.