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<blockquote data-quote="SuperBruce" data-source="post: 2410750" data-attributes="member: 120544"><p>First off, as others have already stated: if your rifle won't shoot a box of factory 140 eldm ammo it's probably a rifle thing and not your ammo, so a quick way to narrow things down. Now on with the show.</p><p></p><p>Only an anecdote, but for me "cleaning back down to bare metal" has had different results in different barrels. On a factory rifle that meant stripping lots of copper out and it could take a good 5 or more shots to "stabilize" the barrel again. I wasted an embarrassing amount of ammo figuring that one out. Now on my proof research barrels, which gather next to no copper, cleaning out the carbon is basically "cleaning back down to bare metal". With those barrels the first shot post cleaning will make the group ~1 MOA and the remainder will be to their ~0.5 MOA which is where I typically want the group size.</p><p>Also consider trying some Hornady ELDM bullets, preferable the 140's if you can find them. I've had great luck with medium jumps with hornady bullets: they don't need to be right at the lands and according to the precision rifle blog that may even be where group sizes are least consistent. Wrt powder, I've found Staball to be a great powder for many applications but the burn nodes are on the narrow side and tend to be either right near max or way low. I personally love staball, but H4350 is definitely more forgiving.</p></blockquote><p></p>
[QUOTE="SuperBruce, post: 2410750, member: 120544"] First off, as others have already stated: if your rifle won't shoot a box of factory 140 eldm ammo it's probably a rifle thing and not your ammo, so a quick way to narrow things down. Now on with the show. Only an anecdote, but for me "cleaning back down to bare metal" has had different results in different barrels. On a factory rifle that meant stripping lots of copper out and it could take a good 5 or more shots to "stabilize" the barrel again. I wasted an embarrassing amount of ammo figuring that one out. Now on my proof research barrels, which gather next to no copper, cleaning out the carbon is basically "cleaning back down to bare metal". With those barrels the first shot post cleaning will make the group ~1 MOA and the remainder will be to their ~0.5 MOA which is where I typically want the group size. Also consider trying some Hornady ELDM bullets, preferable the 140's if you can find them. I've had great luck with medium jumps with hornady bullets: they don't need to be right at the lands and according to the precision rifle blog that may even be where group sizes are least consistent. Wrt powder, I've found Staball to be a great powder for many applications but the burn nodes are on the narrow side and tend to be either right near max or way low. I personally love staball, but H4350 is definitely more forgiving. [/QUOTE]
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