Crop Damage, I am betting you are indeed very close to 3100 fps with that load.
Exbal is good but you should also take a look at Loadbase by Patagonia Ballistics.
Ballistics Software from Patagonia Ballistics
Especially if you are getting into reloading, Loadbase has the most comprehensive ballistics that I have found and allows you to save all of your load development and targets. It also has a reloading library in it, I found your load in there at 87.5 rather than 88.0 and it shows 3100 fps. The library is not designed to replace your reloading manuals but it is a handy feature when you are doing some winter day comparisons because it has a HUGE database.
Like everyone has already said, nothing takes the place of actual field testing, I have a 308 Norma with a Leupold scope, that would not match the drop data produced by Exbal, I chronographed the load kept track of environmental conditions and tried to use the trajectory validation tool in Exbal. It adjusted by changing my velocity, making it 200+ fps faster than the load actually is in order to make it match my drops (no fault of Exbal). Turns out my scope is not adjusting exactly 1/4 minute increments as it should.
Loadbase has a turret function so that you can input your actual turret increment. My turrets are supposed to be 0.250 (1/4 minute) but are actually 0.290. Now my drop charts match my scope adjustments at the correct bullet speed rather than some fictitious speed.