My RPR is showing an alarming drop off in accuracy after maybe 800 rounds with the factory barrel. Must be too soft. I’m looking at a Bartlein or Krieger stainless 1 in 8 @ 26 inches. I want the Bartlein but getting one in less tha 6 months means going to Bug Hole who is too expensive and disorganized. We are taking a difference of at least $125 and the Krieger is satin finished ready to go. Need advice on Best Buy at best price. I don’t want to get it and chase chamber reamer owners and an additional $300 putting a $1k barrel on a $1.1k rifle. Krieger delivers it ready to install but I want some expert input. Also is 7.5 twist necessary or desirable? 1 in 8 seems to stabilize 6.5 CM even in 147 grain just fine normally. Thanks!