Which powder for 123-129gr bullets

[LRRPF52]

You’ll get tighter SDs, minimal temp sensitivity, and accuracy with 8208XBR typically, but faster speeds with CFE223 and LEVERevolution.

You have to be careful with 8208XBR under 120gr class and up as it will hit max pressure around 27.8-28.5gr, depending on your chamber and other variables.

129gr doesn’t allow those charges, so you’ll need to back off of that and not exceed ~26.4gr, depending on which 129gr, COL, chamber, etc.

CFE223 and LEVERevolution are very forgiving since their burn rate is optimal for 120-130gr in Grendel, but you’ll see considerable temp sensitivity.

There is a lot of data for them all here on the forum, as well as in the Grendel Handbooks:



I did some load development just doing pressure safety ladders with CFE223 and LEVERevolution in the Howa Mini Action bolt gun when I had it, which are posted here on the forum.