Since you don't have to worry about cycling you can have some fun lol.
You don't really need that AA 1680 for a bolt rifle. Its whole purpose is to get a pressure curve appropriate for the ar15. It tends to be much louder than necessary in a bolt rifle, but it will work just fine if its what you have.
Lil gun and N110 give me the best results from my 300whisper bolt. 180-250 grain bullets do very well. Accuracy is very good and very consistent. H110 is viable here too, but is said to be temperature sensitive.
American select and red dot give me good results with the lighter bullets, say 160 or lighter. Accuracy is adequate at under 3 moa at 100 yards. They are VERY quiet even without a suppressor. Unique and the other pistol powders can give good results here as well.
Just be careful since pressure can rise very fast with these powders compared to slower ones.
A bolt or break action 300blk or whisper is an excellent rifle. Subsonics are quiet, cheap, economical, AND you can get components even when stuff is scarce. Super sonics can kill deer, work for self defense, and are great for all around use.
You will ALWAYS be able to find components to shoot something out of that rifle. It uses a 30 caliber bullet…. SUPER common. You can run most pistol powders, mag pistol powders, and even the fast rifle powders with decent results. Both small rifle std and mag rifle primers can be used, as well as small pistol std and mag primers depending on your load. The rem 6.5 primers even work on low pressure loads. Brass is 223 cut down, something we can find even now at the range for free many days.
You can shoot for next to nothing with a charge of red dot and a 150g cast bullet.
I really see no down side to it. Another great one is the 357 mag case necked to 30 caliber (great in break action btw)… AND this just gives you a rimmed 300 blk lol.
