Ammo Oracle

The History and Basic Design of .223 and 5.56 Ammunition
Performance of .223 and 5.56 Ammunition
Terminal Performance of .223 and 5.56 Ammunition
.223 and 5.56 Ammunition Testing
Selection of .223 and 5.56 Ammunition
Ammunition recommendations from the authors of the AR15.COM Ammo Oracle
Purchase and Storage of .223 and 5.56 Ammunition
Legal Questions
Miscellaneous .223, 5.56, and other Ammunition Questions
- You people are a bunch of (Fackler worshippers/idiots/jello fans/armchair theorists/mindless fools). How in the world can you expect me to believe (insert Ammo Oracle answer here)? You have all lost touch with the working man shooter with your lofty theories and ivory tower "science." I know for a fact that my super special homemade round will tear up badguys because it tears up potroast like there is no tomorrow. Why should I believe anything on here?
- None of this answers my question. Now what?

OK, that's complex. Simple question: Can I fire M193 ammo in my 1:7 or 1:9 twist barrel?

Introduction

Yes.

M193 is essentially a "universal" round; able to be stabilized by barrels with twists between 1:14 and 1:7. Point of impact will change slightly compared to an M855 zero, so rezeroing is recommended.

FACTS:

The Scoop from the Army's Ammunition Information Notice (61-01) "INTERCHANGEABILITY OF 5.56MM BALL, TRACER AND BLANK AMMUNITION."

It is acceptable to use M193 and M196 ammunition in training in M16A2, M16A3 rifles and M4 and M4A1 carbines (16 percent range reduction). Substituting between types of ammunition during firing is not recommended.

Warning

Confirm Action

Ammo Oracle

OK, that's complex. Simple question: Can I fire M193 ammo in my 1:7 or 1:9 twist barrel?

Introduction

FACTS:

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