Re: Bulk .223 ammo worth shooting in a bolt gun?
Two scenarios:
An experienced shooter with a better than average firearm wants to practice at significant distance. Generally, anything of lesser quality than their customary match ammo is not going to provide an effective indicator of their performance.
That same experienced shooter wants to practice at short distance, perhaps to try variances in their shooting technique. At the shorter distance, ammunition is not as critical a variable, and bulk ammo will probably perform well enough to make a cost saving beneficial. Remember, part of that cost saving is measured in handloading time savings.
Personally, I'd be doing that sort of practice with a rimfire, but somewhere afterward, I'd be doing some C/F shooting to confirm my findings.
Then, there's the beginner. I'm placing my rifle into the hands of a beginner, bringing them up to speed on safe firearms handling and the manual skills involved in basic rifle operation. In essence, handloaded match ammo is going to be wasted in such a process.
While the rimfire can do this too, representative levels of noise and recoil need to be parts of this process.
Also, the expended bulk brass becomes a raw component material for handloading.
Greg