Thread: Fast twist 22-250 Load advice

Your objective is a high case fill ratio, so rather a slower powder than a faster one.

What I recommend is getting your hands on some of the bullets you want to try and then we can work out your cartridge overall length based on when the bullet touches the lands. This will then tell us what your potential powder capacity is. You will also need to measure the case capacity with water, You can find out online how to do that.

Once you know these variables then you can pick a sensible powder to use based on attaining an appropriate 90-95% case fill ratio, with a burn speed that generates safe pressures. Typically in the list of powders for a specific cartridge and bullet weight there are only one or two options that will meet these criteria. For ADI brand, I wouldn’t mind betting that 2209 and 2213SC are pretty close to spot on. I can have a look on Quickload a bit later if you like. But you will need to check your max COAL because if your chamber hasn’t been cut with long for calibre bullets in mind you are disadvantaging yourself using the heavy .224s, and you might need to go for a more middleweight bullet. (Because if you can’t seat the really long bullets far enough out you are robbing too much case capacity and won’t be able to drive them fast enough to make them worthwhile)