Underwood 220gr Hardcast (New Load)

4949shooter · January 26 2014 04:10:20 AM MST

Sorry to hear as well, MT.

How did it feed the previous Underwood 220? How does it feed the light 10 stuff?

IC is right, some of the Gen 4's we have seen have been finicky with the hot ammo. I believe I read over on glocktalk that Glock tests the G20's using CCI Blazer ammo, which is akin to a .45 ACP +P ballistics wise.

mt10mm · January 26 2014 05:21:17 AM MST

I was using stock barrel with stock RSA. Rds would fail to feed almost after every shot.

Ammo didn't feel any different but who knows. I did fire 15rds of DT 200 from the same mag with no issues.

Maybe this Gen4 needs to go down the road. I might start looking for a SF.

Intercooler · January 26 2014 05:24:54 AM MST

The stock 17lb setup? Yea... that's not going to work for anything other then .40-lite stuff.

I really think the spring assembly is the biggest culprit in the Gen 4's. Would you be up to try this:

http://www.ndzperformance.com/Rock-Your-Glock-Gen-4-Recoil-Spring-Guide-Rod-Adap-p/ryg-g4-adpt.htm

With a 22-24lb recoil spring Gen 3 setup?

mt10mm · January 26 2014 05:31:48 AM MST

I do have the lone wolf version with a 22lbs spring set up. I will try it this morning and get back to you

Intercooler · January 26 2014 05:32:44 AM MST

43724 Wolff 24lb spring here:

http://www.gunsprings.com/index.cfm?page=items&cID=1&mID=5#109

Guide rod:

http://www.ndzperformance.com/Glock-OEM-Factory-Guide-Rod-Spring-Assembly-p/glk-sp05586.htm

You would have $50 in it but could sell your Gen 4 setup if this works.

Intercooler · January 26 2014 05:36:31 AM MST

50124 is a Steel assembly with 24lb Wolff spring offered on their site for $30. Looks pretty nice and you only need that adapter to complete the setup.

mt10mm · January 26 2014 05:51:22 AM MST

Thanks for all your help IC but I am going to buy a SF G20 and sell the 4th gen.

I will keep this post updated, will pick up the SF next week.

Intercooler · January 26 2014 05:58:34 AM MST

Hold on to the 220's. Things might pan out with the new SF.

Intercooler · January 26 2014 06:10:48 AM MST

I forgot to ask if you experienced any popped primers or bulges with the new 220's?

mt10mm · January 26 2014 06:13:31 AM MST

Quote from: Intercooler on January 26 2014 05:58:34 AM MST
Hold on to the 220's. Things might pan out with the new SF.

I will, the 220 is what I would like to carry in the woods but for some reason mt 4th gen does not like it. The DT 200 cast does just fine and so does the UW 200TMJ. With the SF I can change the recoil spring no problem.

mt10mm · January 26 2014 06:16:09 AM MST

Quote from: Intercooler on January 26 2014 06:10:48 AM MST
I forgot to ask if you experienced any popped primers or bulges with the new 220's?

I did get a few smiles but no popped primers. I will send you the brass that was fired with the 10rds of loaded UW. I will get that out to you tomorrow. Hope it gets there faster then the last batch I sent you.

Intercooler · January 26 2014 06:32:14 AM MST

If it was fired from the same barrel as the last set of 220's with the popped primers that's good and bad news. The good is that with no popped primers and less of a bulge the load is reduced. The bad is the bulge is probably still related to the barrel in combination with the recoil spring. I will measure your and my brass after firing them.

4949shooter · January 26 2014 06:34:42 AM MST

It looks like those flat meplats are catching on the feed ramp, or something. It's hard to tell from the photo what they are hitting.

You might want to try a different bullet.

Or...a gen 3 might help if you do go that route.

4949shooter · January 26 2014 06:35:28 AM MST

How did they feed with the Lone Wolf barrel?

mt10mm · January 26 2014 06:38:27 AM MST

Quote from: Intercooler on January 26 2014 06:32:14 AM MST
If it was fired from the same barrel as the last set of 220's with the popped primers that's good and bad news. The good is that with no popped primers and less of a bulge the load is reduced. The bad is the bulge is probably still related to the barrel in combination with the recoil spring. I will measure your and my brass after firing them.

Good Idea,

I am starting to think this g20 just does not like the 220, the UW 200 TMJ shoot no problem. Some have no problems with the 4th gen RSA and yet other have do have problems. ${$default_angry_smiley}$ I have tried the 3rd gen adapter with the heavier recoil spring but never did fire the glock with it installed. After it was installed I removed the slide and the RSA fell out, I didnt think that was a good thing so I have never used it.