第一次上靶场实弹测试,只有几种俄罗斯钢壳子弹。精度都不错,平均2.4 MOA。四个五发组,从1.8 到2.9 MOA,没有散布特别大的。这让我兴趣大增。现在买了Federal Gold Medal Sierra Match King 175 grain,下一次去靶场会试一试,看能不能三发组打进Sub-MOA。
栓动的Ruger American Rifle, 打这些俄罗斯钢壳子弹,四发组从1.2 到 2.8 MOA。1.2 到1.5 MOA的,也有好几组。说明这些子弹本身的精度,并不差。有可能这支Bear Creek Upper, 精度就止步于此了。只是我现在玩的枪的种类增加了一些,不像以前那样,每一支枪都想方设法要进Sub-MOA。从我对这支AR-10设想的用途,2.4 MOA的精度,足够使用了。将来实在要换高精度枪管,也不过就是三百到五百美元的事情。
打了大概五十发子弹,有一发Tula子弹卡壳。这是我用各种口径的俄罗斯钢壳子弹,各种品牌,各种手枪和步枪,第一次卡壳。308子弹太贵了,经不起突突,也就是每年上几次靶场,最多打上一百发。要是几年以后发现还有卡壳的问题,就寄回Bear Creek 保修。
要解决Light Primer Strike的问题,可以用别的Lower,223口径经过验证的,试一试。没有的,可以用这个借口买一个高级的扳机,换上去作为对照。如果还不行,当然就跟厂家联系,说明自己的问题,以及自己做过的种种尝试,取得RMA, 寄回厂家保修。
BCG加工如果误差太大,当然有可能造成Light Primer Strike的问题。这个只有厂家可以测量。
If you need the best precision for a price that won’t buckle your knees, Criterion is one of our top picks.
PPT Editor David’s custom Aero Precision AR-10 using a 22″ 6.5 Creedmoor Criterion HBAR Barrel
While the extra’s on David’s rifle has gone through some changes, the Criterion barrel has been outstanding from the first shot.
Getting sub-MOA with an AR-10 isn’t nearly as easy as the cherry-picked groups you’ll see online might lead you to believe. The fact is that gas rifles need a lot of great parts to work together perfectly to produce truly accurate rifles.
Several factory loads are sub-MOA with this rifle and most of that is due to having a great barrel.
Sig Sauer Match 140gr 6.5 Creedmoor — .64 MOA at 100-yardsSig Sauer Match 140gr 6.5 Creedmoor — .64 MOA at 100-yards