AR-10 resizing

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12 years 10 months ago #10012 by mantawolf
Replied by mantawolf on topic Re: AR-10 resizing
Just started reloading .308 for my AR myself. The older gentleman teaching me and what I have read from the reloading books says reloading brass from the same rifle only needs to be neck sized for best accuracy. For a reloader like an AR, its a different beast. You full length resize (with small base dies) for feeding reliability because they are finicky about firing spec ammo.

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12 years 10 months ago #10053 by BUILDING MY SASS
Replied by BUILDING MY SASS on topic Re: AR-10 resizing

hondolane wrote: I am preparing to load for my AR-10T. Due to the potential for slam fires on certain semi-auto rifles, I was always led to believe you should always full length resize. I recently was informed by another shooter that they regularly neck size after the first firing in their AR rifles. I would like to neck size for my AR-10T, but only if it were safe to do so. I have witnessed a slam fire on a M-14 and it was not pretty. Any input on this would be greatly appreciated.


If you fired the first time from a "Bolt Action" you may get away with it...but if Fired from A "Semi Auto"....
FULL LENGTH RE-SIZE....save yourself the trouble......and when Reloading....DO NOT CUT CORNERS.....END OF SUBJECT.... B)
BMS

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12 years 9 months ago #10140 by hondolane
Replied by hondolane on topic Re: AR-10 resizing
it sounds like i already knew the answer to my question about fl resizing vs neck sizing...guess i will fl size just to be safe...and of course proud primers are a problem with autoloaders. im anxious to see how well my new ar10-t upper will group after the break-in.

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12 years 9 months ago #10149 by zfk55
Replied by zfk55 on topic Re: AR-10 resizing
What kind of a break-in procedure will you do?

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12 years 9 months ago #10160 by hondolane
Replied by hondolane on topic Re: AR-10 resizing
in the past, after some research, i have settled on a 45 rnd proceedure. that is: 5 single shots fired with a cleaning and oil patch of high temp/pressure oil after each shot, followed by 5 3rnd shots w/cleaning/oil, followed by 5 5rnd shots w/cleaning/oil. from there i consider the barrel broken-in enough to fire normally. during my research on the subject, i soon figured out that there is a vast difference of opinion on the subject of barrel break-in...any where from do nothing, to firing 100 or more in any number of sequences...not to mention conspiracy theorys about barrel manufacturers recommending many more shots, just to wear barrels out even faster. i donot believe that, but there are many diverse opinions on the subject, like anything else. Also i would add that a day at the range for me usually consists of about 50 rounds followed by cleaning (from the breach whenever possible). thanks for the in-put.

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12 years 9 months ago - 12 years 9 months ago #10161 by zfk55
Replied by zfk55 on topic Re: AR-10 resizing
Are you aware of the David Tubb procedure?
It truly works. Its a 50 projectile kit that does it all at once.

www.davidtubb.com/final-finish-tms
Last edit: 12 years 9 months ago by zfk55.

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12 years 9 months ago #10178 by hondolane
Replied by hondolane on topic Re: AR-10 resizing
well, i have heard of dave tubbs abrasive bullet proceedure, but armalite tech notes highly recommends not doing it. shorter barrel life and accuracy. like i said before, everybody has an opinion and most of them are different. myself, i will stick to the shoot and clean method...sure has to beat the just fire away method, yes?

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12 years 9 months ago #10203 by weshowe
Replied by weshowe on topic Re: AR-10 resizing
Gents,

I'm a firm believer in full length resizing for semi-auto 308's. Of course I'm shooting three different semi-autos and one is so tight chambered it demands full length resizing. I load for that one and the rest gobble it up.

Slam fires a more a function of soft primers than anything else. I don't use Federal 210M's in my semi's due to the soft primers, but Winchester LR have a had cup and testing showed were consistent and only changed the FPS between the two by 8 FPS. That's good to know, if you didn't already.

I may try neck sizing for my GAP AR-10 just to see what happens, but I doubt there will be much difference. Darn thing shoots ragged holes "as is".

Wes

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