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Posted: 10/8/2004 7:05:03 PM EST
Anybody try out to 500yds?
Link Posted: 10/8/2004 7:40:50 PM EST

Originally Posted By mikepenn33:
Anybody try out to 500yds?



The Marines do...

For that range, houwever, 77 or 75gr is MUCH better...
Link Posted: 10/8/2004 8:41:43 PM EST
Yes, we do.

If I do my part, I can hit a man sized target every time at 500 yards using a M16a2 and M855.
It's not easy being an expert rifleman.
Link Posted: 10/9/2004 6:46:50 AM EST
I've never had the chance to try a 500 yard shot, but I know that M855 is much more accurate out of my guns than xm193. IMI M855 is really good stuff. I haven't tried LC.

Link Posted: 10/10/2004 4:26:09 PM EST

Originally Posted By markm:
I've never had the chance to try a 500 yard shot, but I know that M855 is much more accurate out of my guns than xm193. IMI M855 is really good stuff. I haven't tried LC.




Anyone got any tips on mail ordering IMI M855 cheaper than Northwest Loading Supply? They're the only place I see it at, and it's $340 for a carton of 1200 rounds (in 30 round boxes).
Link Posted: 10/10/2004 4:31:20 PM EST
Natchez Shooter Supply has XM855

www.Natchezss.com


They are fair on shipping charges
Link Posted: 10/10/2004 4:49:03 PM EST
Don't get me wrong...

M855 is more accurate out of my guns, but I still load XM193 for defensive purposes.
Link Posted: 10/14/2004 5:18:01 AM EST
M855 does what it designed to do " Shoot M.O.M " out to 500m+. It isn't match ammo and from my experience it will to some wild shit at 500-600 yds if you have a bad lot with offcenter pen tips...Having shot k's of rounds of LC M193/855 mostly at 2 and 300 yds for HP practice , M193 shoots better more consistent groups than M855 for me .
Link Posted: 10/14/2004 8:04:30 AM EST
[Last Edit: 10/14/2004 8:04:57 AM EST by Zak-Smith]
Because of its lower density due to the steel penetrator, the 62gr M855 bullet has a disproportionally high BC vs. its mass of 0.324, whereas 55gr M193 is only 0.260. To compare, the 68gr Hornady only has a BC of 0.355.

_BC_ _MV_ 0 200 400 600 800 1000 | YARDS
0.260 3215 > -2.44 -0.00 -20.60 -82.13 -218.43 -476.56 | > SA M193 55gr
0.324 3100 > -2.44 -0.00 -19.77 -74.45 -185.94 -388.22 | > IMI M855 62gr
0.355 2800 > -2.43 -0.01 -24.17 -89.12 -217.92 -443.62 | > Hor 68gr 20"
0.362 2750 > -2.43 -0.01 -25.00 -91.79 -223.49 -452.75 | > SMK 77gr 5.56
0.395 2750 > -2.43 -0.01 -24.03 -86.82 -207.60 -414.21 | > Hor 75gr 5.56


With more data:

_BC_ _MV_ 0 200 400 600 800 1000 | YARDS
0.260 3215 > -2.44 -0.00 -20.60 -82.13 -218.43 -476.56 | > SA M193 55gr
3211 2492 1878 1379 1066 915 | fps, velocity
Far zero at 200.1, maximum 1.15 at 132.3, falling -1.69"/yd, angle 0.00146 rad

0.324 3100 > -2.44 -0.00 -19.77 -74.45 -185.94 -388.22 | > IMI M855 62gr
3097 2525 2019 1582 1242 1035 | fps, velocity
Far zero at 200.1, maximum 1.19 at 131.2, falling -1.33"/yd, angle 0.00150 rad

0.355 2800 > -2.43 -0.01 -24.17 -89.12 -217.92 -443.62 | > Hor 68gr 20"
2797 2305 1866 1489 1200 1025 | fps, velocity
Far zero at 200.1, maximum 1.63 at 125.8, falling -1.46"/yd, angle 0.00175 rad

0.362 2750 > -2.43 -0.01 -25.00 -91.79 -223.49 -452.75 | > SMK 77gr 5.56
2747 2269 1843 1476 1196 1025 | fps, velocity
Far zero at 200.1, maximum 1.72 at 124.7, falling -1.49"/yd, angle 0.00180 rad

0.395 2750 > -2.43 -0.01 -24.03 -86.82 -207.60 -414.21 | > Hor 75gr 5.56
2747 2307 1911 1560 1277 1084 | fps, velocity
Far zero at 200.1, maximum 1.67 at 125.8, falling -1.34"/yd, angle 0.00178 rad


Because of M855's decent BC and high velocity, it actually has less drop than the heavier bullets at long range.

I realize this doesn't directly address accuracy. The IMI M855 has been pretty accurate for me, however. (ie, 1MOA)

-z
Link Posted: 10/14/2004 8:16:48 AM EST
Here is some more information on the M855

Ballistics and Energy Data for M4 using M855
Link Posted: 10/14/2004 4:50:49 PM EST
like the other Marines on the board. ive fired a lot of M855 at 500m it does quite well. if you can get some spanish santa barbara SS109 i have found this to be near match quality. out of my Colt MT6601 it groups just as well as black hills for half the price!!!
Link Posted: 10/14/2004 4:56:02 PM EST
I'm building a rifle (with a 10x scope). Any chance of 8" groups at 500yds.
Link Posted: 10/14/2004 8:17:57 PM EST

Originally Posted By mikepenn33:
I'm building a rifle (with a 10x scope). Any chance of 8" groups at 500yds.



For the gun? Yes...

Folks do 10-12" groups at 600yds with carry-handle irons...

So 8" at 500 with a scope should be doable...

For mil-issue ammo? NO.

The above results assume 77gr or heavier match-grade open-tip bullets.

(Match rounds have a 'hollow' point do the manufacturing process and the extra stability caused by having a rearward center-of-gravity, they are not designed for expansion/fragmentation, and are thus technically not JHP)
Link Posted: 10/14/2004 8:22:19 PM EST
Anyone ever think of contacting Botach on a ARFCOM guy buy???
Link Posted: 10/15/2004 6:19:21 AM EST
I'm getting 3" groups at 500yds with BH 69 gr with my SPR. Has anyone actual tried it ?
Link Posted: 10/15/2004 6:38:02 AM EST
[Last Edit: 10/15/2004 6:38:21 AM EST by Obiwan_ryobi]
Just bought some from Natchez.....

Then walked into my local shop yesterday

$185/case of 1000

GRRRRRRRR
Link Posted: 10/15/2004 6:44:18 AM EST

Originally Posted By glockguy40:
Anyone ever think of contacting Botach on a ARFCOM guy buy???



Oh You have to be joking. That will be the biggest abortion goin if that ever happened.
Link Posted: 10/15/2004 3:44:40 PM EST
Oh my gosh!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!­!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!­!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!­!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!­!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!­!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! I never thought I'd see the day that markm would say anything good about any ammo other than m193!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Put it in the calendar somebody right this very instant!!! I'm going to hold you to this someday markm!!!!!!
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