Author Topic: trouble with Underwood 38 special +P Xtreme Defender  (Read 1012 times)

matt85

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trouble with Underwood 38 special +P Xtreme Defender
« on: April 05, 2017, 01:57:20 PM »
just as a heads up, I tried a box of Underwood 38 special +p xtreme defender in my S&W 638 recently and had terrible results. the ammunition was horribly inaccurate and appears to be key holing almost every shot.

I called Underwood and let them know I was having trouble along with the lot number. their response was: "we haven't had any trouble with that ammunition but we will look into it".

-matt

Intercooler

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Re: trouble with Underwood 38 special +P Xtreme Defender
« Reply #1 on: April 06, 2017, 02:49:08 PM »
What shape is your your barrel in? Have you shot any lead through it?

4949shooter

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Re: trouble with Underwood 38 special +P Xtreme Defender
« Reply #2 on: April 08, 2017, 03:21:48 AM »
Sounds like the same response I got last time I contacted them reference a bad lot.

Best to talk to Kevin Underwood himself.

The_Shadow

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Re: trouble with Underwood 38 special +P Xtreme Defender
« Reply #3 on: April 08, 2017, 07:16:34 AM »
I have to wonder if the bullets are too small in diameter and not taking to the rifling well. 
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PCFlorida

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Re: trouble with Underwood 38 special +P Xtreme Defender
« Reply #4 on: April 08, 2017, 08:19:35 PM »
I have to wonder if the bullets are too small in diameter and not taking to the rifling well.
That was my first thought.
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4949shooter

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Re: trouble with Underwood 38 special +P Xtreme Defender
« Reply #5 on: April 09, 2017, 02:53:09 AM »
There has been a problem with this and the Lehigh defense bullets in the past, correct?

matt85

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Re: trouble with Underwood 38 special +P Xtreme Defender
« Reply #6 on: April 13, 2017, 04:41:57 AM »
What shape is your your barrel in? Have you shot any lead through it?

barrel was clean, only jacketed ammunition fired threw the gun before trying this ammunition.

I do have 5 of these defender cartridges left, perhaps ill pull one down.

-matt

matt85

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Re: trouble with Underwood 38 special +P Xtreme Defender
« Reply #7 on: April 13, 2017, 05:09:40 AM »
I just pulled a cartridge down and it doesn't appear the bullet is undersized. I measured it at various points and I'm getting .356"-.357" so there is no trouble with diameter.

I haven't ever had trouble with this pistol before and ive shot plenty of different loads over the 6-7 years ive owned it. this gun is very accurate with standard 125gr +p loads.

however I do admit all the loads ive shot have been between 125gr and 158gr so perhaps these pistols have trouble with lighter bullets?

-matt

The_Shadow

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Re: trouble with Underwood 38 special +P Xtreme Defender
« Reply #8 on: April 13, 2017, 08:59:53 PM »
Did you take a measure of the powder charge weight?  Take a picture of the powder?
We need to know these things!  LOL   :))
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matt85

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Re: trouble with Underwood 38 special +P Xtreme Defender
« Reply #9 on: April 14, 2017, 05:05:16 AM »
I thought about it but I have a hammer style bullet puller and sadly a portion of the powder was lost.

-matt

my_old_glock

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Re: trouble with Underwood 38 special +P Xtreme Defender
« Reply #10 on: April 21, 2017, 08:25:25 PM »
I thought about it but I have a hammer style bullet puller and sadly a portion of the powder was lost.

-matt


Weigh the entire cartridge first. After you pull the bullet, weigh the bullet and empty case. Subtract that weight from the full cartridge, and you should have the power weight.



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my_old_glock

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Re: trouble with Underwood 38 special +P Xtreme Defender
« Reply #11 on: April 21, 2017, 08:36:16 PM »

What weight bullet? It looks like the Underwood 38 +P XD is 100grains

The longer the bullet, the faster it needs to spin to be stabilized. Length is the factor, not just the weight.

A shorter barreled gun will spin the bullet at a slower RPM than a longer barreled gun with the same rifling twist rate.

If that is the case then those loads would work perfectly out of a longer barrel gun, but not a shorter one.

P.S. Underwood lists that load @ 1300 fps. I doubt that is from a 2" barrel.


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« Last Edit: April 22, 2017, 09:42:47 AM by my_old_glock »

4949shooter

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Re: trouble with Underwood 38 special +P Xtreme Defender
« Reply #12 on: April 22, 2017, 03:25:49 AM »
Sounds hot for a .38 Special.

Overkill338

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Re: trouble with Underwood 38 special +P Xtreme Defender
« Reply #13 on: July 15, 2017, 12:03:52 PM »
I know this is an old topic but Avoid snake oil bullets. Also, keyholes couldn't possibly a fault of Underwood's, as that usually comes from being spun too slow and a 638 doesn't have much rifling to work with.
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The_Shadow

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Re: trouble with Underwood 38 special +P Xtreme Defender
« Reply #14 on: July 15, 2017, 01:26:24 PM »
I thought about it but I have a hammer style bullet puller and sadly a portion of the powder was lost.

-matt

Yes it takes a delicate touch to keep every speck of the powder especially those very fine spherical types...
I alway work to have the bullet just drop free of the casing as in the kinetic puller.  When separating the bullet and powder I work over a clean piece of typing paper, as I pour the powder into the scale pan.  Small paint brushes can help sweep any loose powder off bullets, fingers or the puller.  This is an art form to be very meticulous and not loose any, but I am anal when it comes to the pull-downs!
The "10mm" I'm Packin', Has The Bullets Wackin', Smakin' & The Slide is Rackin' & Jackin'!
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