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Posted: 1/24/2012 2:35:59 PM EDT
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I have a 556 Classic that I really have not shot much. I put a scope on it today and fired three diff types of Ammo: AE 55 gr, Hornady Steel match 75gr.,Black Hills 77gr. my groups avg for the AE 55 gr was approx 11/2 inch and the other two avg 21/2" all were 5 shot groups at 50yds. do you guys find this aceptable for a 556? any pointers??
I know this is not a bench gun but my PSA M4 was around 1/2". |
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Were you benchresting the rifle for your initial site in, using a tripod, or shooting off of a bag? Did you try the 55gr. first when the barrel was cold and then use the heavier stuff? Also, each round has a different response on the rifle's recoil. In mine, the heavier stuff tends to cause the rifle to "jump" more when using my bipod which could have an affect on your grouping as well.
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If you get 1.5" to 2.5" groups at 100 with the rifle you are doing good. It's not a tack driver but it will get the job done and keep running where other platforms will fail from fouling. I have a 556ER and use 62gr. M855 and it shoots pretty well. |
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It was shooting off a tripod cradle type rest and sandbags. I did shoot the 55gr first, the barrel never got too hot to touch.
At one point I let it cool completely with the same results. I should note that the groups were mostly vertical but the were not gradually going up or down? I was holding it pretty tight I may have put to much pressure on the barrel? but my 522 shot fine actually better then it's big brother. |
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I also have a 522 and it will make dime size groups at 50 with a 3-9x40.
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It was shooting off a tripod cradle type rest and sandbags. I did shoot the 55gr first, the barrel never got too hot to touch. At one point I let it cool completely with the same results. I should note that the groups were mostly vertical but the were not gradually going up or down? I was holding it pretty tight I may have put to much pressure on the barrel? but my 522 shot fine actually better then it's big brother. |
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I guess this is another way of saying it's a battle rifle and not a long range critter gitter! 
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55X's made to be Minute Of Asshole - same as AK's, they are not competition guns. As long as you are holding less than 4" - no worries. Exactly. It's a non floating bbl with a bolt that looks quit similar to an AK. When I shot mine on a freshly painted steel plate at 200yds prone....and I could cover my 20 shot group with one of my hands (not spread). I was quite happy. |
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I got home tonight and took a close look at the muzzle and the crown of this rifle looks like it was beat with a hammer. the only other rifles I have that have a FH is my AR and 522 and they are smooth and clean nothing like the 556. ?
I can email one of you guys picture as Im computer stupid and cant figure out how to post one. |
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Without question, I would be getting in contact with Sig and sending them these pics.
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this was the group a few weeks ago 50yds
http://i1210.photobucket.com/albums/cc405/zoomworms2/securedown2.jpg |
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after Sig changed barrel 50yards 55gr federal
http://i1210.photobucket.com/albums/cc405/zoomworms2/photo.jpg |
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Practice with it and if your groups don't improve then there could be a problem with the rifle. Most likely its just a practicing deficit. I will keep trying, but shooting a better group with the 55gr didn't add up to me. I shoot a lot and when I got my 556, its accuracy is just like yours. I gave it time thinking that I just needed to get used to the rifle. Accuracy didn't improve after I tried different loads and bullets (I handload). Finally called Sig and complained about the rifle's accuracy and they treated me like $hit. I told them that I work for a major sporting goods chain that sells a lot of Sig firearms, and will never recommend another Sig to a potential buyer if this is how they treat their customers. They called me back with a RA and I sent it back to Sig. A month passed by and I got the gun back with a new barrel on it. It will now shoot 1 1/2 MOA on the average. |
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Thats weird. The heavy bullets should have grouped better than the 55 gr. It has a 1/7 twist barrel. My 556 patrol shoots 1 1/2" groups at 100 yrds with 75gr blackhills If you want better accuracy, move the target back to 200 yards instead of 100 yards. |
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