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Old 12-28-2011, 07:59 PM
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Default 55gr versus 62gr in popularity



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This is not a question which round is better, but which one is more prevalent out there. MY guess is there's more more prepper folks stocking 55gr over 62gr.

I am very green to AR's. However, I do think the military uses 62gr for their main round for the regular joes using M4's.

Just debating on what I should be stocking up on. I am leaning heavily towards 55gr FMJ stuff, probably due to price.

On a side note, how is the point of impact vary for run on the mill 55gr versus that 62gr federal military stuff. Just wondering how off it would be at 100 yards. 2-3" lower or less?
Old 12-28-2011, 08:07 PM
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62 about 80 % with 55 20%
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Old 12-28-2011, 10:07 PM
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whats your barrel twist rate? This will help determine the best round for you to store.
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Old 12-28-2011, 10:16 PM
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at 100 yds the difference in poi is negligible.
Old 12-28-2011, 10:29 PM
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I am a retired Infantry soldier and I have used both rounds on active duty.

Both need to be fired from a rifle that has 1 in 9 inch twist for the rifling in the barrel.

The 62 grain is going to give you much better penetration at a distance but normally will leave a 'through and trough" gunshot wound. that is, a .22 cal hole going in and coming out unless it hits a major bone.

The 55gr bullet will give you much greater exit wounds but will not penetrate as well as the 62 gr bullet. The wounds were actuyally called devastating by the NATO people that tested it and turned it down.

If you want, there are photos of the wounds from both rounds in the 'net.

Real life in a PAW environment (which is propbably the only time you would be actually shooting at people) it doesn't really matter. A bullet wound from either bullet would most likely be fatal, if not right away then as a result of no medical care.

You can find the M855 (62 gr green tip)ammo 'battle packs' i.e. 420 rounds on stripper clips in a can for about $150.00 plus shipping. There is a lot available right now because Federal produced a lot of it at their Lake City plant and the militaryt changed to the M855A1 round so the over production of the M855 has been released for civilian sales.

There is also a lot of the M193 (55 gr) ammo available. Don't be afraid to buy the Israeli Military industries (IMI) produced M193 (also known as the SS109) because it is really good ammo.
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Old 12-28-2011, 10:31 PM
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Originally Posted by 18alfa View Post
62 about 80 % with 55 20%
about the same here. Love the 62gr hp
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Old 12-28-2011, 10:35 PM
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62gr is optimal in my 1:9 twist barrel. Reverendog is correct. POI is negligable. My rifle groups slightly better with the 62gr Match king.
55gr seems to be the most frequent find around here. 69gr groups similar to 55gr in my rifle.
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Old 12-29-2011, 07:12 AM
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55 grain should be more prevalent simply due to cost...

https://www.montanagoldbullet.com/pricelist.html

i can get 3500 FMJ BT .224 bullets for $273 plus $5 S&H for a cost of $0.079 (8 cents) a bullet.

meanwhile... 4000 62 grainers can be had for $360 plus god knows what for S&H for a cost of $0.09 a bullet... small cost increase, but I didnt factor in S&H this time

http://www.midwayusa.com/product/258...cket-boat-tail
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Old 12-29-2011, 08:46 AM
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Just ordered Hornady TAP, 75 grain, just 100 rounds for testing. Does any of you guys have experience with it?
Old 12-29-2011, 09:55 AM
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Originally Posted by Waldlaeufer View Post
Just ordered Hornady TAP, 75 grain, just 100 rounds for testing. Does any of you guys have experience with it?
My guns love it. Prvi Partisan makes a good 75 grain shell too. http://palmettostatearmory.com/180.php
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Old 12-29-2011, 09:59 AM
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Just ordered Hornady TAP, 75 grain, just 100 rounds for testing. Does any of you guys have experience with it?
1/9 twist is marginal for stabilizing that bullet. 1/8 usually is ok, but 1/7 is the better bet. Understabilized bullets hurt accuracy.
Old 12-29-2011, 03:00 PM
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55's

1/9
Old 12-29-2011, 03:10 PM
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I have 1/9.

Shoot both 55 M193 and 62 M855. Groups definitely not as tight using the M855 out of the 1/9.

I believe overall, you're going to eek out better performance in flesh with the 55 gr over the M855.

Utilize a 1/9 barrel and you can utilize both no matter what you come across. Even with all the milsurp available today, probably more chances running into the lighter stuff than the heavier. 55gr is way more common.

But I plan on having/using just what I stock. Not a fan of scavenging.
Old 12-29-2011, 04:47 PM
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My 1/7 twist BCM loves the M855 penetrators. I reload and buy pulled M855 bullets in bulk fairly cheap. 55 gr's would probably fly better out of a 1/9 twist, they do ok in my 1/7 but not as good as a heavier bullet.
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Old 12-29-2011, 05:51 PM
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The 5.56 Nato was first used in 'Nam in the Armalite rifle, now called the M-16.

It had a 1:15 twist rate and they used the 55gr. They soon decided that a 1:12 was better.

At first the soldiers were skeptical of a .224, but when they saw how the round tumbled, broke, and made multiple wound channels on impact, they never complained. It is a deadly round. One of the first reports was of an enemy getting hit in the stomach and part of the bullet ending up in his butt and part in his lung.

The military stayed with 55 gr and 1:12 twist until tracers became common. Tracers are much longer projectiles.

The rate of twist needed is determined ONLY by the length of the projectile and has nothing to do with the weight. Tracers are long and light weight and need a 1:7 twist to stabilize well.

Once the 1:7 was needed for the tracers, the military went to 62 gr bullets only because they are longer than the 55 and will stabilize.

55 gr may not stabilize from 1:7 and may even tumble and break in flight.

Now, as civilians, unless we are shooting the longer 60-70+ gr match bullets, we buy the 1:9 twist because it works OK for 55 and 62 gr, which is what we commonly find.

I have all 1:9 twist, and buy or reload only 55 gr M193. I don't want to mix ammo after I've sighted in for 300 yards.

When I reload I have a chronograph to assure I get my 3250 fps to match my factory ammo.

Otherwise I have nothing against 62 gr other than cost, and I believe the 55 gr is deadlier in that it tumbles, breaks up and causes multiple wound channels where a 62 gr, being longer and more stable on impact, might go right through.

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Old 12-29-2011, 06:30 PM
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Quote:
Originally Posted by Bud View Post
I am a retired Infantry soldier and I have used both rounds on active duty.

Both need to be fired from a rifle that has 1 in 9 inch twist for the rifling in the barrel.

The 62 grain is going to give you much better penetration at a distance but normally will leave a 'through and trough" gunshot wound. that is, a .22 cal hole going in and coming out unless it hits a major bone.

The 55gr bullet will give you much greater exit wounds but will not penetrate as well as the 62 gr bullet. The wounds were actuyally called devastating by the NATO people that tested it and turned it down.

If you want, there are photos of the wounds from both rounds in the 'net.

Real life in a PAW environment (which is propbably the only time you would be actually shooting at people) it doesn't really matter. A bullet wound from either bullet would most likely be fatal, if not right away then as a result of no medical care.

You can find the M855 (62 gr green tip)ammo 'battle packs' i.e. 420 rounds on stripper clips in a can for about $150.00 plus shipping. There is a lot available right now because Federal produced a lot of it at their Lake City plant and the militaryt changed to the M855A1 round so the over production of the M855 has been released for civilian sales.

There is also a lot of the M193 (55 gr) ammo available. Don't be afraid to buy the Israeli Military industries (IMI) produced M193 (also known as the SS109) because it is really good ammo.
SS109 is not M193. SS109 is the NATO designation for M855. SS109 is a 62gr green tip steel penetrator.
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Old 12-29-2011, 07:08 PM
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My Noveske and Krieger barreled guns like the heavier weight stuff for sure. I like to shoot 69 and 77 grain match ammo.
Old 12-29-2011, 07:37 PM
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Quote:
Originally Posted by *Paladin* View Post
SS109 is not M193. SS109 is the NATO designation for M855. SS109 is a 62gr green tip steel penetrator.
You're right and I put that in the wrong place.

Proving once again that you should never post when drinking
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Old 12-29-2011, 07:57 PM
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Quote:
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You're right and I put that in the wrong place.

Proving once again that you should never post when drinking
Hahahaha!!! Right you are Sir, right you are!
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Old 12-29-2011, 08:02 PM
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Q3131 for me (not Q3131A)
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