~3160 and ~3220 have been good nodes for me as well I backed down to the 3160 to ease up on the brass and barrel a little bit. I’m shooting a Shilen 26” savage prefit, 1:7t. Not sure of the freebore on this one, but it isn’t optimized for the bullet. Optimized would be around .160” FB. Both the Blackjack 131 and Berger 135 will prefer the same FB from my experience. I’ve only taken it to 1250yds, but it’s a laser and the trace on the glass looks like the wake from a mastercraftI built one for a guy but I didn't get to do the load development on it. He claims its a beast with those Blackjacks and Retumbo. He's getting 3,167fps and some pretty stellar accuracy. Here are a couple pictures he sent to me. One five shot group and then a 10 shot group. Has me thinking of building one for myself.