That sounds like good advice because if you're doing your part that rifle should shoot.
slinkylegs I know the thread is about the 6.5 Grendal not 223 but you mentioned your Howa mini so regarding the rifle, for comparison, and also incase it's a 223, I just bought a howa mini 20" HB a few months ago and it's shooting very well np exceeding the guarantee. I haven't shot factory but the 75 & 73 eldm, the 55gr tnt and even the speer 52gr hp shoots very well out if it. I was experimenting with the 52's, it's an 8 twist so I wasn't necessarily expecting the 52"s to fly very well but they worked fine. If your done testing it maybe you should have the rifle looked at.