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Old September 14, 2021, 09:24 PM   #1
Captains1911
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10mm Ammo for Deer

I’m planning to hunt deer this season with my G20. Of the following 3 factory ammo loads, what would be the best choice for this task? I already have all three of these in my possession. I’ll probably limit my range to 30-40 yards.

Hornady Custom 180gr XTP
Doubletap 200gr Hard Cast
Buffalo Bore 220gr Hard Cas
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Old September 14, 2021, 09:37 PM   #2
bamaranger
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XTP

I don't think you'll need the extra penetration offered by the two hard cast options. Whitetails are relatively thin skinned and small boned when compared to hogs or bears, which are the intended targets of the two cast loads. Additionally, the Glock polygonal rifling is said not to be compatible with cast bullets, yielding poor accuracy and fouling. The jacketed XTP seems your best option. The XTP has a good reputation for holding together while offering useful expansion. Hunt like a bowhunter, picking your shots and angles accordingly, and I'd be quite surprised if you have any trouble.

I load XTP's in my G20 when after deer, no shots yet!
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Old September 14, 2021, 10:24 PM   #3
Captains1911
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Originally Posted by bamaranger View Post
I don't think you'll need the extra penetration offered by the two hard cast options. Whitetails are relatively thin skinned and small boned when compared to hogs or bears, which are the intended targets of the two cast loads. Additionally, the Glock polygonal rifling is said not to be compatible with cast bullets, yielding poor accuracy and fouling. The jacketed XTP seems your best option. The XTP has a good reputation for holding together while offering useful expansion. Hunt like a bowhunter, picking your shots and angles accordingly, and I'd be quite surprised if you have any trouble.

I load XTP's in my G20 when after deer, no shots yet!
I was leaning towards the Hornady for those reasons as well…expansion rather than penetration. I just wasn’t sure because the documented velocity on that load seems to be about 150 - 200 fps lower compared to some of the other popular 180gr offerings (BB, Doubletap, and Underwood).

By the way, I’ve tested the BB and Doubletap hardcast in my factory Glock barrel and they seem to shoot just fine.
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Old September 15, 2021, 04:07 AM   #4
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I have a couple of G20 builds, I use longer aftermarket barrels with increased head support. 10mm might be better than nothing for a critter defense cartridge, I'd personally opt for a Lehigh defense extreme penetrator going as fast as possible. On that note, I would chrono whatever you use so that you get a realistic idea of your velocity/range/energy limitations.

sorry--got this confused with the bear defense thread where someone mentioned 10mm.
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Old September 15, 2021, 05:06 AM   #5
riverratt
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I'm not familiar with the cast offerings you listed but I'll weigh in with what experience I've had.

I've used 230gr +p in a .45 ACP and 180gr in .40 S&W to take a few deer. Both were XTP bullets and of the three deer I shot none had an exit wound (2 with the .45 and 1 with the .40) on 2 of the deer the expanded round came to rest against the ribs on the opposite side and the other resting just under the hide. The 10mm giving higher velocity may provide a bit more penetration or it may give the same penetration but expand a bit more. Either way none of these deer left anything remotely close to what I would call a trackable blood trail but died inside of a hundred yards.

I've killed several deer with a 265gr .43 cal rnfp traveling at 1300 fps out of my .44. The blood trails are short and typically good, always a full passthrough.

I've also taken 1 deer with a 158gr rnfp out of my 9mm traveling at 1000fps. Full passthrough with a marginal blood trail of about 75 yards or so. If it were me I'd choose one of the hardcast bullets if they shot good but that's just my opinion.
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Old September 15, 2021, 07:55 AM   #6
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I just found a limited run of Black Hills 10mm ammo, loaded with the Hornady XTP bullet, advertised around 1300 fps. I think I'll grab a box of it.
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Old September 15, 2021, 06:37 PM   #7
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The hardcast loads are designed for max penetration to stop large predator attacks. You don't need that for hunting deer. Most any 155 gr or heavier HP should be fine.
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Old September 16, 2021, 06:05 PM   #8
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Go with the XTPs. Shot a lot of stuff with 10mm using XTPs, other JHPs and Hardcast. I have shot an Elk with 180 XTPs at 80 yards...dropped in its' tracks.
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Old September 16, 2021, 06:29 PM   #9
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Go with the XTPs. Shot a lot of stuff with 10mm using XTPs, other JHPs and Hardcast. I have shot an Elk with 180 XTPs at 80 yards...dropped in its' tracks.
Do you happen to know what velocity you’re pushing those XTPs at?
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Old September 16, 2021, 09:55 PM   #10
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Quote:
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Do you happen to know what velocity you’re pushing those XTPs at?
MV of 1370.
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Old September 17, 2021, 10:23 AM   #11
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I don't see any reason it won't work as long as you keep it down to short distances & you do your part & hit the vitals.
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Old September 17, 2021, 10:48 PM   #12
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Cast won't shoot well in the Octo rifling. If I were using a 10mm, I'd go with the 200 XTP.
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