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Posted: 12/27/2014 1:43:47 AM EDT
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Hey guys.
I'm new to this forum and I'm actually new to AR shooting in general I recently built in AR and have put well over $2000 into it, and at 100 yards I'm not even getting 1.5 MOA. I'm using the same scope I used on a Remington 700, and it's actually not that expensive of a scope. It's a falcon menace that I picked it up for about $500. but I was shooting .5 MOA with that gun, and scope. the upper receiver is a Fulton armory 20 inch match grade heavy barrel upper with Daniel defense picatinny rail system. the lower receiver is a spikes tactical, and I have a luth AR MBA butt stock. I know most of you are probably going to relate this to scope issues but I've already ruled out the scope as I noticed the inconsistent shop pattern at 100 yards ranging from 1.5 MOA to 2.0 MOA so I moved it to 50 yards and I shot .2 MOA at 50 yards exactly were my zero for 100 yard would hit at 50 yards. I'm using 62GR green tip FMJ. I have not tried to shoot different grain size yet. 62gr seem to be in the median for all the bullet sizes that I could get. the barrel has a 1 in 9 twist. My ammo choice was actually dependent on the barrel twist rate because past experiences with using a medium size rounds with a mid range twist rate yielded good results. But I've only shot larger caliber rifles like 270 and 308 and above. I spent a lot of money on this and I want to get as much for my money as I can. Here Is a pic. if URL doesn't work I'll try to get one that does soon. http://s1.postimg.org/tufe1hzzj/image.jpg |
| Well as Ive stated, I'm not very experienced with these rifles other than plinking with red dot carbines. I'm not familiar with the ballistics or how well these perform at range. If you say I've done well despite my doubts, I'll take your word for it. Maybe I just expected too much for it not being match grade. I'm curious to know what the average groups for hornady 75gr bthp match are. Found a really good deal on 1000 rounds of it, but I'm not sure about that heavy of a load in a 1 in 9 twist. Seems 1 in 7 would be more appropriate. Anyone have experience with these under similar conditions?? |
| Each barrel is unique in some way I suppose. I guess it would be beneficial to see what my gun performs best with. I have ordered 5 boxes of ammo all of which are different gr. and design. I did get two different kinds of the 69gr. both are match grade bthp but have different powder charges. I'll be sure to take pictures and keep a record of the shot groups when I get go to the range again. Thank you for your advice. It is appreciated. |
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What the hell is 62gr green tip FMJ????
Is this pulled down bullets, some USGI ammo, or something that you broke out a magic marker and started coloring????? IF real USGI win/LC plant produced M-855 ammo and you are getting 1.5MOA out of the rig, then should be giddy as shit . If surplus or reloads, the gods are smiling on you even more. OK, rant over, and to see what the rifle is capable of producing, you need to start hand-loading for it, and with a Bullet that is a lot more unified, and designed to shoot tighter groups, that just being able to punch through steel with a steel penetration at the tip. |
| Based on what you guys are saying, I'm beginning to change my opinion on what I have. The ammo is actually labeled as M-855, Not sure if that means it's technically surplus. You guys are making anxious to try out the ammo I ordered. Pretty pumped about seeing what this thing can do. If I get some tight groups with match ammo, I'll start hand loading to see how tight I can get them. |
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M855 is a bullet type (62 gr with steel penetrating tip),
As for current military production of USGI M-855A1, it's produced out out of the LC plant by ATK. General dynamic owns ATK, which they own Federal as well, so there is Fed XM-855 produce for the civilian market, and since ATK had it written in there contract, they can now produce Civilian ammo out of the LC plant, ammo for the civilian side is just labled XM-855 (think of the X as over run ammo). So in regards to XM-855 and Xm-193 on LC cases, call it overruns, but it still the same ammo as it M counter parts for the military for the most part (some of the ammo is not primer crimped, since this is a military requirement). http://www.atk.com/products-services/defense-group Stepping away from that (since you did not call the ammo XM-855 produced for the civilian market), I can name over a half dozen manufacturers of M855 ammo (bullet tip designation), which may not group as well the LC M855A1/Xm855 ammo (less than 3moa is acceptable for the goverment out of a M-16). Also to point out, the factory match ammo may do well out of the rig, but to get all the rifle has to offer, you will need to hand load for it ( jump to land, and even charge to get the best barrel harmonics for a give barrel). |
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