Sending 156's, I am going to give you what happened to me when I was pretty much just starting out in varminting, precision shooting, and precision reloading. I will use my 17 Remington for this as it is the one rifle that really saw vast improvement.
I had 600 rounds of once fired R-P brass, good reloading dies, a good scale, and a recipe that seemed to work good. I thought the 17 would be pinpoint perfection for small varmints. I could not get less than 2.1" at 100 yards, then I was starting to loose 3 cases out of 9 every session. scrubbed, cleaned and went back at it. well same result.
I annealed and got a consistent 1.25" groups plus loosing only 2 per every 9 shots. then I started asking around, I tried a friend's inside neck reamer and die. WOW what a great improvement. I went from 1.25" at 100 yards to .50" at 200 yards. then I was plagued with blown primers so I had to only use BR primers. My FPS went into the single digits, my extreme divination was cut to 9 FPS. Sometimes 14 FPS. the bulk of my rounds were coming out within 3 FPS of the median.
My 22-250, 300 win mag, 7.62X51 (M-1A), 270 Win, 7.62X61 (M-1 Garand) all got the same treatment and all saw similar if not just about as good results as the 17 saw. My brass loss has gone down to near 1 in 100. I have seen my M-1s' brass hardly ever burst on me. the higher pressure cartridges have had dog bone or neck splits of maybe after 12 reloadings. where they would split after 5 to 6 reloadings.
annealing and neck turning have been the best two processes I ever did to my match brass or my hunting brass. they last longer, the make the long range shots more accurate, and they make me more confident in my shooting long range.