Thread: Fast burning powder in a short 243

Just watch out when using faster burning powders as your powder charges are less than in a slow burning powder, ie they don't fill the case like the slower powder. You can sometimes get higher pressure when using fast powder that doesn't fill the case. 2208 and 2206h should be ok. You should always aim at 90% full or better with the powder you use.

Yeah, thats what i was wondering. How do you know. Do you just ruke of thumb, run It at 90%? I might put some factory ammo through in the dark and see how much flame I'm getting. Old school.