77 grain 556 vs 62 grain 556 green tip
December 11, 2017 at 10:02 pm #108652CivilianresponderParticipant
Getting ready to make a purchase and I’m wondering if it’s worth while to buy some more expensive 77 grain for combat loads or just stick with quality 62 grain 855 (I already have a bit of this). I use wolf gold 55 grain for training.
December 12, 2017 at 4:07 am #108653Mike QParticipant
Buy a box of each and figure out which works best for your barrel. Then buy the right one in bulk.
December 12, 2017 at 4:55 am #108654TCParticipant
I have some 77gr and a 4-14x scope for DMR style shooting. I get ~1MOA out of my 16″ BCM ELW 1:7 barrel with it. Seems unnecessarily expensive to use it for dynamic stuff at closer ranges though. But if I had to reach out 500-800 yards with 5.56 then I would prefer 77gr for sure.
December 12, 2017 at 5:31 am #108655KeeperParticipant
77 grain is a good round for DMR shooting and TC is right it will reach out to 500-800yrds
December 12, 2017 at 8:00 am #108656BrigandActualParticipant
It depends on your needs, honestly. I you need the range/accuracy? Are you willing to sacrifice barrier performance to get there?
77gr SMK loads have ok terminal performance, but not fantastic. They have poor barrier penetration. Their best use is maximizing range in the open.
If you can find it, XM556FBIT3 is a good all round defensive load.
December 12, 2017 at 9:59 am #108657wheelseeParticipant
I’m experimenting with 75 gr BTHP. I use 20-round mags to distinguish the different loads.
December 12, 2017 at 11:00 am #108658CivilianresponderParticipant
Thanks for all the info. I’ll get some more 62gr. Sounds like that will be everything I need.
March 2, 2018 at 4:09 pm #108659libertycallsParticipant
The 77g doesn’t give much gain, while it wears out a barrel quicker. The 62g performs well out to 450 yards, better than 55g XM193’s. I’ve experienced this first hand. There’s also more wear on the barrel with a heavier projectile.
The 62’s are a good compromise in price to performance, and barrel life.
I’m not shooting green tips, I’m shooting some bulk FMJ projectiles that I load my self. I didn’t have a 20″ barreled rifle to compare them to, but I’ve got one now. Once I load up some more rounds I’ll see if there’s any difference in the longer barrel.
March 2, 2018 at 8:06 pm #108660
March 3, 2018 at 8:55 am #108661hellokittyParticipant
Every 5.56/.223 Ammo has its positives and negatives. There is no perfect round. You just use the best you can afford. Don’t forget ALL of them will make a hole in a person. So don’t over think it.
HEAT 1(CTT) X 3
HEAT 2 (CP) X1
March 11, 2018 at 2:37 pm #108662QuietOldManParticipant
I shoot Federal XM193 55grain. Works well with my BCM Recce 16.
March 12, 2018 at 4:22 am #108663KeeperParticipant
The 77g doesn’t give much gain, while it wears out a barrel quicker.
pleased explain and show how it wears out a barrel. is it true for .30 also
March 13, 2018 at 12:09 am #108664HitsCountParticipant
I use MK262 for SBRs and SPR/DMRs (long range). The lower fragmentation velocity improves performance at longer ranges and out of shorter barrels. The improved accuracy is nice with SPRs/DMRs.
Everything else eats 55 grain M193 clones except for the competition service rifle which gets match grade 223.
Each of the MK262 rifles has a DOPE card with the adjustment needed to bring the zero back for M193. The M193 rifles have a DOPE card with the adjustment needed to go to MK262.
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