2019 I bought a NIB Remington 700 SPS .223 to use as a donor. I had 8 hand loads of .223 left from another rifle that had gone down the road, shot three to get it on, moved target out to 100, and it put the next 5 under an inch. Went to loading bench, loaded up 20 more, and it shot 10 under an inch. I since put a Trigger Tech trigger on it, which along with load development has made it a sub moa rifle.
Never shoot the donor.
