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You might should talk to Radsav. Give him your specs and intended target and he'll tell you which head to use. Go right to the source for the best info possible.
I ran 125 grain titanium vanDyke's last year. 2 deer, 2 elk. Does and cows of course I'm a little to trigger happy to hold out for antlers.
Where did you get them? I have been trying to find those heads in 125 and been unsuccessful