Originally Posted by Winchester 69
The Forster (and Sinclair) neck-turning mandrels are 0.002" less than bullet diameter. Sinclair has an expander mandrel that is 0.001" smaller than bullet diameter. It fits in their expander body and is used in a press.
Yeah, just looking for a way to get started with this method. All the new cases I have bought have been too tight to accept the Forster hand held outside neck turning mandrel. If you know already the neck diameter of the die then that helps but you still have to turn the necks to use this system. With new cases the neck is too tight for a mandrel, after firing the neck is too big and after sizing they are too small again, for the neck turning mandrel that is.
So I guess you have to buy an expander mandrel and expander body to expand the necks of new brass so that you can get the neck turning mandrel in. Cheaper to buy a Lee Collet Neck Sizer which will expand the necks in new brass just right for neck turning. But then you have a Lee Collet Neck Sizer and don't have to buy a FL die and don't have to neck turn unless you have a tight necked chamber.
I can't find the expanders on the Sinclair website but did find it posted where the expander costs $18.50 and the mandrel $8.50 and most FL dies run $25.00 so that is $51.50. A Lee Collet cost $17.00 and a Redding Body Die cost $22.00 so that is a cost of $39.00 to do the same thing.
A good thing to know for the next caliber where Lee doesn't make the Lee Collet though.
Have y'all ever run into a FL die where the inside diameter of a FL die was so small that you had to turn the necks below .010"?