28 Nosler and Retumbo

Has anyone had experience running Retumbo in a 28 Nosler? I was running N570 but am running out. I recently found an 8 lbs jug of Retumbo and I figured if it worked out I would have enough to finish this barrel off with one load since I haven't found N570 in
I'll trade you 8 for 8
 
Settled in at 82.5g Retumbo 3.488 COAL F215 primer 169g HH ADG brass Avg MV 3,294 fps SD-5.2 ES-10. Shot this group at 200 yds this evening. Next time out will be at a range I can shoot up to 1000 to check dope. Target is 90 degrees off in the picture.
Screenshot_20220909-182205_Range Buddy.jpg
 
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