09-01-2013, 03:27 PM
LRRPF52 Wrote:I do it as a standard modification on the Grendel bolt face for the reasons the article describes. The author is Robert Whitley, who is well-known in the AR15 competitive and varminting community.
Here's another good article on accuracy: http://bulletin.accurateshooter.com/2011...s-answers/
Very good article LRRPF52! There are quite of few good things I've been doing in my set ups and a few bad I might change.
A couple good points he posted: # 1 is a given so were on that path with the Lilja buy.
1) As we have on the Group Buy and note #7 he states a few things to consider on your order. Heavy barrel between the upper receiver and gas block, the Lilja buyers should read this. The 310, 311 and AR24 fit this criteria.
2) Upper Receiver on points 2,3 and 4: He recommends the tight fit upper as I have a few of that are Mega Arms SBU's. His looks just like them in the side charge model but I have the non side charge. The upper needs heated to expand the aluminum for the barrel extension to fit in and then when it cools, it clamps and holds the barrel even without the barrel nut. This takes care of items 2,3 and 4
3) Gas block like a JP or other clamp on's. No need for the notch like Lilja is providing if you use this type as recommended.
4) Comp should be symmetrical. I have JP's on my match 223 Wylde and is not symmetrical. Been having flyers, wonder if that's my issue. I think I'll try a few groups without the comp to see if that improves the groups. I have a Muzzle Break from Brownells on my 24" Grendel with good groups. I might get one of these to see if there is a difference in my groups on my Wylde. http://www.brownells.com/rifle-parts/bar...13070.aspx
All of his topics need to be considered for a good build and again, a great article for a great rifle.