I have not had a 222 for 20 odd years so it's possible that the burn rate was adjusted I used that load for countless years velocity was around 3200 to 3230 from memory I used to be able to load PMC brass close to 20 times before binning itYeah 50-52gr bullet and 20.5-21.5gr 4198. 21.5 is pretty hot. Say 20.7 and a 50gr v max. Be cautious of the Hornady 53gr v max as it might not stabalize in your 14 twist
N133 52 gr bullit against the lands works good for meI have one 222. After reading a fair bit and tinkering with mine very little, I believe you will have a hard time finding a bad load. Bullet length with your twist should be considered.