Home Forums Classifieds GT Store Blogs Today's Posts Search Social Groups


Glock Talk
Welcome To The Glock Talk Forums.

Thread Tools Display Modes
Old 12-30-2011, 10:32   #1
Senior Member
DRT's Avatar
Join Date: May 2001
Location: USA
Posts: 1,359
Hornady 5.56mm 55gr GMX

I just got my 2012 Hornady LE & Military catalog and they've included the 55gr GMX loading in their catalog. It looks the same as the superformance GMX loading.


Here are the specifics:

Product # = 81255 (5.56mm pressure)
55gr GMX (no polymer tip that's typical with other GMX bullets. It resembles a non-boattail TSX but with a larger internal HP cavity)
B.C. = .245
S.D. = .157
Advertised Velocity out of a 16" test barrel):
Mz = 3130, 100yd = 2739, 200yd = 2380, 300yd = 2049

Gel Test:

16" 1:9 weapon
Measured Velocity = 3193
21" Penetration (pretty amazing for a fully-expanded 55gr .22 cal bullet)
Max Cav = 4" (not nearly as dramatic as the 75gr TAP)
Depth to Max Cav = 5"
Entry = 1"
Retained weight = 55gr

The bullet looked like a perfect mushroom. I suspect that the guilding metal construction will retain its petals through intermediate barriers better than a pure copper design . The profile of the mushroom looks more similar to a conventional bullet versus the TSX that has substantial gap between the petals. I bet this would make a good hunting round as well.

By the way, the gel shot with the 75gr 5.56mm TAp 8126N still looked the most impressive of any .223/5.56mm round. It obviously remains a top pick for unobstructed shots.
DRT is offline   Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT -6. The time now is 22:11.

GT Wiki
GT Blogs
Social Groups
GT Store

Users Currently Online: 1,137
266 Members
871 Guests

Most users ever online: 4,634
Apr 18, 2015 at 3:37