Twocan
To be real honest , I have never seen any real difference between FL sizing and Neck sizing in most production guns , bullet seating depth has done more for me than anything else .
As for the Re19 , it may be a case of it being just too fast of a powder for the Browning , and if thats the case , adding more powder may not help any as you have seen , you may want to look at maybe Re22 , Re25 or even IMR 7828 or H1000 .
stimpy