Mildots in 2nd focal plane on any high mag scope is practically useless, too much going on.
T50 can almost fit 6 dots in a kill at 50 yards, similar March 80 almost 8.
On the other hand mildot in 1st focal plane has markings a bit too wide, dot to dot fills a 40mm kill at 44 yards. Saying that far better than 2nd fp.
Using on my other little March a 1/8" dot since end of March similar to Leup Comp series, just judge by size of kill old school. I will be having this ret changed to a DiPlex similar to Leupold Duplex.
The Premier Ret 3 dots either side in fine, one above and below bracketing a 40mm kill at 50 yards was perfect.