trimming brass for the ar10

[JohnhenrySTL]

I was wondering if trimming brass to an equal 2.005 is an absolute when reloading my AR10 brass for my sig 716.

I am planning on skipping the crimping, trimming, and chaumpering steps in order to lesson my time and save my brass.

I am about to re-pack 96 pieces. As long as they are between 2.005 and 2.015 inches am I good to go?

These are planking rounds. I have accuracy 100% figured out, lol. I am now pursuing speeding up loads for planking.

Thanks in advance for my continuing questions.

 

[rcmodel]

If you are not crimping?

Any .308 case is fine as long as it is shorter then 2.015".

If it's longer then that, it has to be trimmed.

I would strongly suggest you chamfer & debur them all them all the first time though for easier bullet seating.

And also make sure you have proper case neck tension to prevent bullet set-back during feeding.

Draw a line around the bullet / case neck joint with a black Sharpie and chamber them from the mag several times.

If the black line is still visible, you are good to go.

Rc

 

[Thundercat]

If you are not crimping?

Any .308 case is fine as long as it is shorter then 2.015".

If it's longer then that, it has to be trimmed.

I would strongly suggest you chamfer & debur them all them all the first time though for easier bullet seating.

And also make sure you have proper case neck tension to prevent bullet set-back during feeding.

Draw a line around the bullet / case neck joint with a black Sharpie and chamber them from the mag several times.

If the black line is still visible, you are good to go.

Rc

That's what I ended up doing per your advise, worked for me.

 

[ironworkerwill]

In auto loading rifles trimming below max is a good thing! Deburring should also be done if the case is trimmed. This will all add up to more functional feeding.

I don't suppose chamfering would be absolutely necessary for plinking.

 

[Walkalong]

It isn't worth the potential trouble not to trim, deburr and chamfer brass. It just doesn't take that much time.

 

[gamestalker]

If you load bottle necks, you must maintain trim too length as per SAAMI spec..

And when you trim, you need to chamfer / deburr, it goes with the territory.

GS

 

[JohnhenrySTL]

They were all within spec. I always put even a subtle chamfer on all my rifle brass. Ive had too many bad experiences with brass bucking at the shoulders when not. However, I was curious to see if I can avoid trimming brass at times. I will see how they cycle.

After loading them all, and needing to trim 2 or 3, I also realized that it doesnt take much more time to trim, chamfer and debbur. Thanks again all.

 

[joem1945]

I trim mine to min specs. As I load boat tail bullets I don't bother with chamfer at all. I've not had any problems but my brass is all military stuff.

 

[JohnhenrySTL]

Joem do you buy the once fired military brass with mixed head stamps? Or how do you get military brass? How does it work? I have thought it here lately. Although Ive seen better deals on factory ammo than I have since I was in high school.