The one main downside of a second focal plane riflescope is when dealing with adjusting the magnification to anything other than max power and using the reticle for any holdover or windage when taking a shot. ... This is why whenever I'm hunting, I'll always shoot at an animal at the highest magnification.
Is first or second focal plane better?
In a first focal plane scope, the Mil/MOA lines will be accurate and true throughout the entire magnification range. In a second focal plane scope, the subtensions will only be accurate on a specific magnification, typically the maximum magnification.
Do Snipers use FFP or SFP?
FFP vs SFP for Snipers
Aside from competition, military and police snipers also have a use for FFP scopes when there needs to be a rapid and precise follow-up shot. That could mean the shooter is spotting their own miss, or it could mean they are working with a spotter calling a correction.