7mm stw load development

I have had several 7 STW's, customs.

all loading data for this case I have seen seems light, my loads were heavier, never shot anything but R#22 and IMR 7828 with 120 & 140g bullets.

550 yards is a chip shot.
 
Depending on bullet weight, I'd think N570 would be a top performer.

It's not the easiest to find and certainly isn't cheap but it always seems to be a top performer.
 
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