AR Reloaders- how important is trimming your once fired brass?

[GJgo]

I've heard conflicting reports about the X dies, so I didn't buy one. Hmm..

 

[mwinston]

Another point to keep in mind is if the case is too long and you use the cannalured bullets for seating depth the round will not feed well in a ar magazine, they will bind and will fail to feed in semi autos.

 

[Hiaboo]

I always trim after sizing, no matter what.. HOWEVER I'd say 70% of my brass do not need trimming after 2 or 3 firings.. I use middle loads, produces most accuracy for me. Those that go through max. loads tend needs trimming after resizing.


Note, I measure every piece of brass w/ my caliper and toss the ones that are oversized in a bin and ones that are in spec in another. Trim the ones that are oversized, saves some time.

 

[SwampWolf]

I always trim after sizing. Are some of you trimming before sizing? If so, is there any merit in doing it that way?