So, I've recently gone down the rabbit hole of concentricity gauges, neck turning, bushing dies, co-ax presses, etc. in an effort to eliminate unexplained flyers and hopefully shrink my groups.
In a nutshell, the issue I'm having right now with my Redding FL bushing sizer is that when I FL sized to get the brass ready for neck turning (using a Forster non-bushing FL sizer), that process brought the brass necks down from the ~.315" fired diameter to .305", and turning brought it down to .304". But my target tension tells me I want a .308", which is the bushing I bought.
So, now my necks are about .004" too tight for what I'm looking to do. Is there a way to fix this? I can't use the expander that came with the Redding Type-S die because it's too small, and even if it was big enough, it'd mess things up on its way back out of the neck, causing a different problem.
I suppose on my next lot of brass, I could just turn the necks without FL sizing the brass, although 1) I worry that if the brass fits too loosely on the neck turning mandrel (an extra .010" of wiggle room), that could cause problems with the turning operation, and 2) that doesn't help me with this current lot of brass.
Is there a step that I'm missing somewhere? Should I have skipped the pre-turn FL-size?
In a nutshell, the issue I'm having right now with my Redding FL bushing sizer is that when I FL sized to get the brass ready for neck turning (using a Forster non-bushing FL sizer), that process brought the brass necks down from the ~.315" fired diameter to .305", and turning brought it down to .304". But my target tension tells me I want a .308", which is the bushing I bought.
So, now my necks are about .004" too tight for what I'm looking to do. Is there a way to fix this? I can't use the expander that came with the Redding Type-S die because it's too small, and even if it was big enough, it'd mess things up on its way back out of the neck, causing a different problem.
I suppose on my next lot of brass, I could just turn the necks without FL sizing the brass, although 1) I worry that if the brass fits too loosely on the neck turning mandrel (an extra .010" of wiggle room), that could cause problems with the turning operation, and 2) that doesn't help me with this current lot of brass.
Is there a step that I'm missing somewhere? Should I have skipped the pre-turn FL-size?