[nonnieselman]

Shot my Delton AR last night when we got thru shooting 22s and shooting a full size silhouette i fired 5 rounds and noticed the holes looked funny. 4 of them hit sideways. I got another mag and fired about 20 more and most them hit sideways or had started yawing..
What would make that happen?!?!
They were m193 pulled bullets, 25grs WCC844, CCI450 primer in mixed brass.
Cant say ive ever seen that happen before, especially that close.

Gonna try some factory loads and make sure its not the barrel.
Ive shot it alot, but not nearly enough for it to be tumbling like that.

What do yall think?
Week before we went to camp mccain it was printing a nice 6" group at 300yds with Tula steel case junk.

 

[Dock Rocker]

Operator error! :lol3:

 

[Beladran]

i thought the barrel life on a 223 was like in the 10s of thousands??

 

[captain-03]

Operator error! :lol3:

:lol3:

 

[VegasSMG]

Non chrome lined barrels will start showing throat erosion at about 5K rounds and chrome lined at about twice that. I've got a 14 1/2" Bushmatser barrel that's seen nothing but full auto fire and many Beta C dumps. The throat erosion is getting really bad but the accuracy is surprising and no key holing after ten thousand rounds+.

Shooting .22LR in a non chrome lined barrel allows the slightly smaller .22LR bullet to foul the grooves at a faster rate than a chrome lined barrel. Consider that .22LR is not jacketed but copper washed and the smaller diameter bullet will leave lead in the barrel. Typically a few rounds of 5.56 is enough to clean up most of the lead deposits left behind in a chrome lined barrel. I suspect you still have some lead that needs to be removed.

A barrel with a 1 in 7 twist is a long way from optimum for stabilizing .22LR. I'm betting this faster twist rate will speed up lead deposits. I shoot .22LR in a 1 in 9 twist chrome lined barrel which is still not that great but some lead deposits are left behind are even after shooting a few rounds of 5.56 behind it. The flashider will also lead up and I'd suggest you remove it, clean if needed, and check the muzzle/crown while you're at it.

*The groups you're getting with Russian ammo are nothing short of phenomenal!

 

[nonnieselman]

This is a Delton 5.56 rifle 1:9 .. I dont shoot .22 thru it, have a ST22 for that...
i had it out there when we were shooting and decided to put a few more holes in the target. and thats when i noticed the keyholing. It might just be that run of pulled bullets arent right or something.
Im gonna run some tula thru it after i clean it and see what it does.
I did go thru about 300rds the sunday after the camp mccain shoot in less than 2 minutes and melted the handguards. i dont thnk that would have hurt it bad enough to start keyholing.

Im gonna give it a good cleaning and take the flashhider QD off and look at the crown.

My stevens .223 bolt action will do 3/4-1" groups with the junk ammo.
I pulled 3 rounds out of one of the mags and shot a crow at 265yds first shot with the stevens, so i might have a fubard barrel..
Guess we have a barrel we can go ahead and run FA thru it till it melts!! :lol4:

 

[Dock Rocker]

You should have sold it to Jay!

 

[amiles87]

im down for the wtfo action

 

[Guest]

If you got the barrel hot enough to melt the handguards, then, you could possibly have damaged the lands of the rifling. Check your barrel very carefully.

 

[nonnieselman]

I shot it saturday with several different ammo and all them tumbled.. then i shot my DPMS heavy barrel and they all shot straight.. So conclusion is, that barrel has become a prime candidate for some full auto fun.

Then im gonna put a good barrel on it and not shoot it as much

 

[swede62]

Before you condem the barrel run some heavy duty copper solvent thru it. Let is soak a bit and do it again with some good heavy brushes, and run until the patches are clean.

 

[nonnieselman]

Swede, i cleaned it with sweets 7.62 till the patchs come out clean. The next day i cleaned it again by mopping the barrel with sweets 7.62 for 2 min, brushed it with a bronze brush and a nylon brush. Wet patchs of sweets, then dry patched till clean. Then mopped with hoppes 9 and brushed again. Later i used hoppes copper solvent and it come out clean so the other 2 cleanings must have done it. But it still shot sideways.
After taking the barrel off you can see the throat is what looks like its charred white.
Now i have a 6.8 barrel on it