Re: Case length and OACL
LD and Steve are both spot on the money.
More details are needed on the bullet that you are using.
Is it a Spire Point, Round Nose, etc and what brand is it?
Typically, the listed COAL (Cartridge OverAll Length) measurement is a a general guideline, as Rifleman mentioned. That COAL will sometimes coincide with cannelure location but most of the times it won't.
If you need to use the cannelure for crimping, then seat the bullet to that depth and crimp as needed. Otherwise, where the cannelure is located in relation to the case mouth can be ignored.
As LD noted, Hornady doesn't make a 110gr with a cannelure and a 110gr of any style is gong to be very short in any .30-06 chamber. Any style of 100/110gr will have a considerable amount of freebore (bullet jump before entering the rifling) since most .30-06 chambers have enough throat to accept the big long 220gr round nose bullets without them contacting the rifling.
Also, a 100/110gr is a very short bullet and doesn't intrude into the case very much at all so the extra 0.075" seating depth that you would need to seat to the cannelure isn't an issue in this particular situation. It may be an issue with longer bullets or with certain powder/load combinations that fill the case to at or near the 100% load density point.
Again, please post up a little more info and we can help you out with more specific answers.
And Welcome to TFF!