Oelof:
just some thoughts:
My opinion is the Barnes TSX is too long for this application, secondly my experience and other's experience has been that the performance is not as billed if you cannot get top velocities with the Barnes.
A couple guys that go by Mule Deer and CZ550 really know their stuff, if you do a search, there is a fair amount written about the 9.3, one guy loads to 60k the other to 64k, one likes R17, one ahs concerns about temp stability, my interpretation is it is an accuracy concern
If I was in your shoes, I would stick with the R17 powder and go with the Swift A-Frame if that is the bullet that is readily available. I would ladder load up to your required velocity and a then a bit more, maybe up to 2530fps, see what shoots the best accuracy, and go with it.
Thanks MtnT.
I have done just that. I have loaded of 286gr Swift A frame's. Going to shoot them this coming Sunday. Will report back on POI vs the Hydros and speed/accuracy obtained.
