Federal's most recent cartridge has me intrigued. I'd ultimately like to build an 18" SPR using the round. However, I heard that there have been some issues with the loads themselves, inconsistent grouping primarily. This isn't grapevine/forum/gunshop hearsay, but I don't want to say which rifle manufacturer I heard it from as to protect the relationship with them. Has anyone experimented with Valkyrie yet? What group sizes have you seen from the various factory loads? This is only one rifle I've heard of issues in, but I haven't seen enough data from other rifles to determine which part of the equation is actually causing the problem, so if you have first hand experience please include what rifle you were using as well as ammunition, barrel length, and twist (if known).
*Edit* I failed to mention the issues initially.
*Edit* I failed to mention the issues initially.