My 1:8" twist SPR likes 69-grn SMKs over Varget, loaded as long as I can to still allow mag loading and crimped using Lee factory crimp die.
You may be over-sizing your brass w/ small base dies and I'd never buy them as the 1st option, but would wait until the particular gun/chamber/load told me I may need them. Regardless of die brand/type, I strongly recommend you buy a Wilson chamber gauge or other means/tool to properly setup your sizing die so you're setting the shoulder back no more than ~0.002" from fired brass in your chamber.
Set your charge (then bullet seating length) using Dan Newberry's "Optimal Charge Weight" (OCW) method. It works! I've shot groups at 200Y approaching 1/3 MOA. Have since bought that OnTarget app to measure my shot dispersion (mean radius) and will further develop loads using no less than 10-shot groups.
Have fun!
Last edited by Flint62Smoothie; 05/05/17.
