donw
You may need to get 45/50 cal - "crush ribs" for that Optima - especially if it is new... I would order both just so you are not to dissapointed if one doen't fit.
Myself, I prefer the longer petals - I think they come off quicker - I have no scientific evidence to back that up but I do like the longer ones...
I use 99% MMP sabots so - I have not got a lotof experiance with Harvesters....