Ruger American Ranch Ammo Question

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nekvermont

Blackhawk
Joined
Sep 10, 2010
Messages
857
Location
vermont
Hi, Rifle is a Ruger American Ranch 5.56 NATO. Twist rate 1:8. I have only fired .223, mostly 55gr FMJ through this rifle, because I have a lot. My question is ... are there any benefits to shooting 5.56 vs. .223 especially related to accuracy? I'm kind of guessing something a little heavier than 55gr would potentially be a little more accurate, would that be right?
Thanks
 

Mobuck

Hawkeye
Joined
Dec 25, 2007
Messages
7,550
Location
missouri
Not really. This whole .223/5.56 thing has gotten out of hand. In 'some cases' it's more of a labeling/marketing ploy than anything else. In some cases, there may be a slight variation in the actual loading specs. Some 5.56 loads may be listed as 100+fps faster than .223 but this may or may not result in noticeable improvement in accuracy.
I shoot Hornady/Frontier 55 grain HP 'match' ammo in 3 flavors (steel match, .223 labelled, and 5.56 labelled) and don't see any diff at normal ranges. Often not even a change in POI.
Accuracy based on bullet weight is questionable. Your 1:8 twist should produce acceptable accuracy with bullets from 40 to 68/69 grains. This covers the majority of 'need' parameters. Heavier bullets MAY buck wind better and/or retain a bit more accuracy at extreme ranges BUT this is usually only a 'need' for those shooting the .223 at very long range at paper targets.
Don't get bogged down with bullet weight concerns unless you're a long range paper shooter.
 

beentheredone

Single-Sixer
Joined
Mar 27, 2022
Messages
142
Location
SC
No one can answer your question, as no one but you has your rifle. There are 5.56 and .223 loads using a wide variety of bullet weights and types. Try as many as you can and you will find your rifle's favorite. Theoretically, a heavier bullet should be more accurate -- but rifles are individuals, just like people, so only experimentation will give you your answer.
 
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