That's the same as what I load for a mates 270, think it's 55.5 of w760 with Hornady 130 interlocks for 3030 fps.
It's not a sexy "Enduron maximum extreme" powder but it's very good in many calibers, I've been messing around with it in 308 with 220 grain pills as well with decent results.
Johnny's Reloading Bench on YouTube did a good breakdown on temp stability when staball 6.5 when it came out and compared to 760 and a couple of others, worth checking out if it's a concern.
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