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Old 09-21-2012, 14:55   #1
deadandgone
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Underwood 220 gr hardcast

I'd been waiting for this....although I'm not sure I thought I would see a 220 grain....velocity seems outstanding....hmmmm....
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Old 09-21-2012, 16:47   #2
harrygunner
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I was hoping for and suggested a 200gr WFNGC. The reasons being, one still gets good penetration, but more importantly, allows a standard Glock barrel rifling to stabilize the bullet.

Too heavy and this happens ( hickok45's video) :
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Old 09-21-2012, 23:56   #3
Yondering
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The standard Glock rifling is fine for heavy bullets. It's the poor fit and crappy tolerances of that 230gr bullet that Double Tap uses that's the problem. The same is true for any cast bullet, they just usually aren't that bad.

Last edited by Yondering; 09-21-2012 at 23:56..
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Old 09-22-2012, 12:49   #4
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Gosh darn it! Now I've gotta save up for some 220 hardcast. Oh well i guess the 200 xtps, 135 noslers, and 165 gold dots will tide me over for now lol.

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Old 09-24-2012, 20:25   #5
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This is exciting ammo for the hunting 10mm enthusiasts.

The video is a good ole boy evaluation but cinder blocks are just too tough to cook. Even slow cooking doesn't tenderize them!
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Old 09-26-2012, 13:04   #6
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Using a G20, KKM 6" barrel, would the 220gr HC Underwood require more than the stock spring?

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Old 09-26-2012, 16:45   #7
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Quote:
Originally Posted by edhead35 View Post
Using a G20, KKM 6" barrel, would the 220gr HC Underwood require more than the stock spring?

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Require--no. Might eject better.
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Old 09-26-2012, 17:02   #8
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What weight spring should I use with this ammo?
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Old 09-26-2012, 20:42   #9
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Very cool

10mm is an awesome round.
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Old 09-26-2012, 20:46   #10
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Quote:
Originally Posted by harrygunner View Post
I was hoping for and suggested a 200gr WFNGC. The reasons being, one still gets good penetration, but more importantly, allows a standard Glock barrel rifling to stabilize the bullet.

Too heavy and this happens ( hickok45's video) : Glock 20 with heavy cast bullets - YouTube
Great video as usual from Hickok45.

However, someone needs to tell him that there's a big difference between hot 10mm and hot 44mag.
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Old 09-26-2012, 20:47   #11
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Quote:
Originally Posted by harrygunner View Post
I was hoping for and suggested a 200gr WFNGC. The reasons being, one still gets good penetration, but more importantly, allows a standard Glock barrel rifling to stabilize the bullet.
Same here. That said, I'm pretty impressed with the 200gr TMJ Speer rounds. They seem to hold together very well.
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Old 09-27-2012, 10:52   #12
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Quote:
Originally Posted by edhead35 View Post
What weight spring should I use with this ammo?
IMO, you should use the same spring weight you use for any other hot 10mm round.
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Old 09-27-2012, 13:07   #13
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Per an email I got from Underwood, all bullets stabilized perfectly through a stock barrel. Even so, do you guys think I could expect leading since the bullets are not gas-checked?

Great forums btw. Glad to finally be part of it!
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Old 09-27-2012, 16:57   #14
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these bullets are gas checked.
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Old 09-27-2012, 17:07   #15
edhead35
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Originally Posted by arushus View Post
IMO, you should use the same spring weight you use for any other hot 10mm round.
I just need a starting point on spring weight. This is my first venture into hotter loaded 10mm until I start reloading.
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Old 09-27-2012, 19:02   #16
Otto33
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Originally Posted by icelandicstud View Post
these bullets are gas checked.
I had assumed they were, but the email I received from Kevin at Underwood specifically stated that the bullets are NOT gas checked. That's what lead me to post the question about leading in the stock barrel.
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Old 09-27-2012, 20:05   #17
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Originally Posted by edhead35 View Post
I just need a starting point on spring weight. This is my first venture into hotter loaded 10mm until I start reloading.
Just shoot it with the stock spring weight and see if you feel that it is problematic. At that point you might boost spring weights if you find a specific reason, but it is totally not a requirement.

The only time my gun has failed (other than due to worn parts) is when I switched to a 22# spring. The stock spring is 100% with whatever loads I run. I replace it every 3000 rounds.
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Old 09-28-2012, 16:56   #18
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Quote:
Originally Posted by edhead35 View Post
I just need a starting point on spring weight. This is my first venture into hotter loaded 10mm until I start reloading.
I run an ISMI 22lb spring on my G20, and it's never failed me once, even with .40sw tulammo. I wish I had gotten the 24lb ISMI spring tho, 22lb wasnt enough for my gun with hotter ammo, it would still sling brass fifteen or twenty feet.

Like tater said, it isnt a necessity, shooting with the stock spring is perfectly fine. Personally, I do recommend a heavier spring if youre going to be shooting a lot of hot stuff, just to keep the battering down on your gun, but that's just me.
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Old 09-28-2012, 16:58   #19
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Quote:
Originally Posted by Otto33 View Post
Per an email I got from Underwood, all bullets stabilized perfectly through a stock barrel. Even so, do you guys think I could expect leading since the bullets are not gas-checked?

Great forums btw. Glad to finally be part of it!
Every bit of research ive done indicates that so long as you check your barrel every fifty rounds, and clean it when necessary, you will be fine...
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Old 10-03-2012, 22:10   #20
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This is exactly what i've been waiting for. Although i kind of expected a 200 grain bullet. The 220 is fine with me if it works well. That is interesting if it is truly not gas checked. Any idea when it can be ordered, or has anyone recieved any yet and shot it?
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