01-23-2022, 11:17 PM
Good job H2S.
Not surprising that CFE223 has a 3.2 fps/F. Most ball powders are more temperature sensitive than extruded powders. possibly Winchester Staball 6.5 to be the exception, but it's burn rate is too slow for the 6.5 Grendel for optimum usage.
another powder that works well with 120 to 130gr. bullet in the 6.5 Grendel is Hodgdon H4895. Made by Australian Defense Industries (ADI). It is one of Hodgdon's "extreme" powders. No de-copper agent but the tempco is 0.2 fps/F. so over 10x better on the temp coefficient issue. It also burn quite uniformly and when the right load is reached SDs can also be low with it. And it ignites much easier than ball powders do, similar to most stick powders. It's pretty fine grained as stick powders go so thrown charges don't vary too much. of course if your going for max precision one tends to weigh each charge anyway, regardless of powder type.
you might give H4895 a consideration if low temp co's are important to you. Otherwise CFE223 has that de-coppering agent in it, which is nice, and one gets good velocity and loading density in the 6.5 Grendel with it as well. So other than temp coefficient CFE223 has a lot to offer with the heavier bullets in the 6.5 Grendel in my opinion.
regards,
-tdbru
Not surprising that CFE223 has a 3.2 fps/F. Most ball powders are more temperature sensitive than extruded powders. possibly Winchester Staball 6.5 to be the exception, but it's burn rate is too slow for the 6.5 Grendel for optimum usage.
another powder that works well with 120 to 130gr. bullet in the 6.5 Grendel is Hodgdon H4895. Made by Australian Defense Industries (ADI). It is one of Hodgdon's "extreme" powders. No de-copper agent but the tempco is 0.2 fps/F. so over 10x better on the temp coefficient issue. It also burn quite uniformly and when the right load is reached SDs can also be low with it. And it ignites much easier than ball powders do, similar to most stick powders. It's pretty fine grained as stick powders go so thrown charges don't vary too much. of course if your going for max precision one tends to weigh each charge anyway, regardless of powder type.
you might give H4895 a consideration if low temp co's are important to you. Otherwise CFE223 has that de-coppering agent in it, which is nice, and one gets good velocity and loading density in the 6.5 Grendel with it as well. So other than temp coefficient CFE223 has a lot to offer with the heavier bullets in the 6.5 Grendel in my opinion.
regards,
-tdbru