Firearm & Gun Forum - FireArmsTalk.com > Long Guns > Auto & Semi-Auto Discussion > AR-15 Discussion > question

Reply
 
LinkBack Thread Tools Display Modes
Old 05-11-2009, 11:55 AM   #1
Feedback Score: 0 reviews
 
Join Date: May 2009
Posts: 4
Default question

I am new to the ar15 I know absoulutly nothing about them. Mine is a stag looks like the model 6 and all but says model 15 on it. 24" bull barrel .223 and all. I had some cheap ammo here that I used in a ruger mini 14(62gr) and it didnt group real well.(wouldnt group in a pie plate) I got some better ammo and alittle heavier (77 gr) I got to shoot 4 rounds and it had started to rain. Those 4 rounds measures 3/8" and I was impressed and satisfied. I was wondering if anyone else had trouble with the lighter bullets. thanks for any info

__________________
sharp_briar is offline  
 
Reply With Quote

Join FirearmsTalk.com Today - It's Free!

Are you a firearms enthusiast? Then we hope you will join the community. You will gain access to post, create threads, private message, upload images, join groups and more.

Firearms Talk is owned and operated by fellow firearms enthusiasts. We strive to offer a non-commercial community to learn and share information.

Join FirearmsTalk.com Today! - Click Here


Old 05-12-2009, 02:36 AM   #2
Feedback Score: 0 reviews
 
Join Date: Feb 2009
Posts: 6
Likes Given: 1

Default

You need to check the twist of your barrel. That will determine what weight bullet to shoot in that barrel. It sound like you need to shoot from 69 grain bullets up.

__________________
60tbird is offline  
 
Reply With Quote
Old 05-12-2009, 01:41 PM   #3
Feedback Score: 0 reviews
 
Join Date: Mar 2008
Location: I see you, and you will not know when I will strike
Posts: 24,301
Liked 3478 Times on 1609 Posts
Likes Given: 3590

Default

I am inclined to agree. What is the twist rate of the barrel you are using?

JD

__________________
Dillinger is offline  
 
Reply With Quote
Old 05-12-2009, 05:44 PM   #4
Feedback Score: 0 reviews
 
RL357Mag's Avatar
 
Join Date: Apr 2008
Location: Albany,New York
Posts: 3,251
Liked 4 Times on 4 Posts

Default

Who made your "cheap ammo"? 62gr. should be heavy enough to group well within 2". But "pie-plate" accuracy sounds like Wolf or steel-cased crap. My bull barreled RRA doesn't group well with factory 55 gr. Remington FMJ's, but it definately keeps them within 2" at 100 yds. Moving up to 68 and 69gr. reloads tightens it up to well under an inch. The twist on that gun is 1:8". Also, is that cheap ammo labelled 5.56 or .223?

__________________
Guns Have Only Two Enemies-Rust and Politicians
"The United States Constitution (c) 1791 - All Rights Reserved"
If Guns Kill, Do Pencils Mis-spell Words?
Pain is Weakness Leaving the Body - USMC
"Qui desiderat pacem, praeparet bellum"
RL357Mag is offline  
 
Reply With Quote
Old 05-13-2009, 12:32 AM   #5
Feedback Score: 0 reviews
 
Join Date: May 2009
Posts: 4
Default

Thanks for the replies the "cheap ammo" I am using is brown bear 62 gr bimetal sp lacquered case. I relize it was cheap ammo but didnt relize it was junk I guess I got what I paid for.

__________________
sharp_briar is offline  
 
Reply With Quote
Old 05-13-2009, 01:01 AM   #6
Feedback Score: 0 reviews
 
RL357Mag's Avatar
 
Join Date: Apr 2008
Location: Albany,New York
Posts: 3,251
Liked 4 Times on 4 Posts

Default

Quote:
Originally Posted by sharp_briar View Post
Thanks for the replies the "cheap ammo" I am using is brown bear 62 gr bimetal sp lacquered case. I relize it was cheap ammo but didnt relize it was junk I guess I got what I paid for.
The real issue is it's not just "junk", but it could be problematic junk. Most AR manufacturers warn against the use of steel cased laquer-coated ammo. Under the press. & temps sustained in the chamber, the laquer has been known to melt and transfer to the chamber walls thereby decreasing the chamber dimensions and making FTE and stuck cases a real pain. Also since steel does not expand and contract as much and as rapidly as brass, the fired case does not grip the chamber walls like a brass case and can slam the bolt face causing damage over time. You might think about using your chamber brush judiciously with something like gun scrubber or laquer thinner to remove any deposits depending on how many rounds you've put through your rifle.
__________________
Guns Have Only Two Enemies-Rust and Politicians
"The United States Constitution (c) 1791 - All Rights Reserved"
If Guns Kill, Do Pencils Mis-spell Words?
Pain is Weakness Leaving the Body - USMC
"Qui desiderat pacem, praeparet bellum"
RL357Mag is offline  
 
Reply With Quote
Reply

Thread Tools
Display Modes